{ "range": "1088-1151", "total": 64, "good": 57, "needs_revision": 7, "items": [ { "index": 1088, "id": 4007, "type": 2, "image": "/images/questions/imp4_question_image/imp4pg217q3.png", "question": "All angles in the figure are right angles. Perimeter of figure is cm", "answers": [ "94", null, null, null ], "correct_index": 945, "verdict": "NEEDS_REVISION", "notes": "correct_index=945 does not match answer=\"94\"; stray digit \"5\". CI should be 94." }, { "index": 1089, "id": 4008, "type": 2, "image": "/images/questions/imp4_question_image/imp4pg217q4.png", "question": "All angles in the figure are right angles. Perimeter of figure is cm.", "answers": [ "76", null, null, null ], "correct_index": 76, "verdict": "GOOD", "notes": "Perimeter FIB. ci=76 matches answer. Answer requires figure to verify." }, { "index": 1090, "id": 4013, "type": 2, "image": "/images/questions/imp4_question_image/imp4pg219q9.png", "question": "All angles in the figure are right angles.
Draw dotted lines to divide the figure into rectangles and/or squares. Then find the area of the figure.
Answer : cm².", "answers": [ "208", null, null, null ], "correct_index": 208, "verdict": "GOOD", "notes": "Compound figure area FIB. ci=208 matches answer. Answer requires figure to verify." }, { "index": 1091, "id": 4014, "type": 2, "image": "/images/questions/imp4_question_image/imp4pg220q10.png", "question": "All angles in the figure are right angles.
Find the area of the figure.
Answer : cm²", "answers": [ "260", null, null, null ], "correct_index": 260, "verdict": "GOOD", "notes": "Compound figure area FIB. ci=260 matches answer. Answer requires figure to verify." }, { "index": 1092, "id": 4019, "type": 2, "image": "/images/questions/imp4_question_image/imp4pg221q5.png", "question": "The perimeter of the figure is cm.", "answers": [ "70", null, null, null ], "correct_index": 3, "verdict": "NEEDS_REVISION", "notes": "correct_index=3 does not match answer=\"70\". CI should be 70 (perimeter value). Same figure as id=4020." }, { "index": 1093, "id": 4020, "type": 2, "image": "/images/questions/imp4_question_image/imp4pg221q5.png", "question": "The area of the figure is cm²", "answers": [ "216", null, null, null ], "correct_index": 0, "verdict": "GOOD", "notes": "Area FIB. ci=0 (fallback convention, unlike sibling questions using ci=answer_value). answers[0]=\"216\". Same figure as id=4019." }, { "index": 1094, "id": 4025, "type": 2, "image": "/images/questions/imp4_question_image/imp4pg222q1.png", "question": "The figure shows a square field with a path of 2 m wide around it.
The area of the path is m².", "answers": [ "96", null, null, null ], "correct_index": 96, "verdict": "GOOD", "notes": "Path area around square field. ci=96 matches answer. Answer requires figure to verify." }, { "index": 1095, "id": 4026, "type": 2, "image": "/images/questions/imp4_question_image/imp4pg222q2.png", "question": "The figure shows a rectangular field with a path of 1.5 m wide around it.
The area of the path = m².", "answers": [ "123", null, null, null ], "correct_index": 123, "verdict": "GOOD", "notes": "Path area around rectangular field (1.5m wide). ci=123 matches answer. Answer requires figure to verify." }, { "index": 1096, "id": 4027, "type": 2, "image": "/images/questions/imp4_question_image/imp4pg223q3.png", "question": "Ted makes a photo frame by cutting away a square inside a 25-cm square cardboard.
The area of the remaining cardboard = cm².", "answers": [ "336", null, null, null ], "correct_index": 336, "verdict": "GOOD", "notes": "Remaining cardboard after cutting square from 25cm square. ci=336 matches. 25^2=625, inner=289=17^2, 625-289=336. Plausible." }, { "index": 1097, "id": 4028, "type": 2, "image": "/images/questions/imp4_question_image/imp4pg223q4.png", "question": "A rectangular towel measures 100 cm by 70 cm. It has a border 6 cm around it.
The area of the border = cm².", "answers": [ "1896", null, null, null ], "correct_index": 1896, "verdict": "GOOD", "notes": "Towel border 100x70 with 6cm border. 100*70 - (100-12)*(70-12) = 7000 - 88*58 = 7000 - 5104 = 1896. CORRECT." }, { "index": 1098, "id": 4029, "type": 2, "image": "/images/questions/imp4_question_image/imp4pg224q5.png", "question": "A swimming pool measures 50 m by 25 m. A worker puts floats to cordon off a portion of the pool for diving practices.
The area of the remaining pool = m²", "answers": [ "700", null, null, null ], "correct_index": 700, "verdict": "GOOD", "notes": "Remaining pool area after cordon. ci=700 matches answer. Answer requires figure to verify cordon dimensions." }, { "index": 1099, "id": 4030, "type": 2, "image": "/images/questions/imp4_question_image/imp4pg224q6.png", "question": "Zack cuts away a 7-cm square at one of the corners of a paper, as shown in the figure below.
The area of the remaining paper = cm².", "answers": [ "179", null, null, null ], "correct_index": 179, "verdict": "GOOD", "notes": "Remaining paper after cutting 7cm square corner. ci=179 matches answer. Answer requires figure for original dimensions." }, { "index": 1100, "id": 4031, "type": 2, "image": "/images/questions/imp4_question_image/imp4pg225q7.png", "question": "Hugh cuts away a rectangle corner of a 30-cm square paper, as shown in the figure.
The area of the remaining paper is cm².", "answers": [ "702", null, null, null ], "correct_index": 702, "verdict": "GOOD", "notes": "Remaining paper from 30cm square after cutting rectangle corner. 30^2=900, 900-198=702. Plausible (cutout=198)." }, { "index": 1101, "id": 4032, "type": 2, "image": "/images/questions/imp4_question_image/imp4pg225q8.png", "question": "The rectangular field is 80 m long and 65 m wide. A worker cements a rectangular portion of the field to make a carpark.
The remaining area is m².", "answers": [ "3920", null, null, null ], "correct_index": 3920, "verdict": "GOOD", "notes": "Remaining field area 80x65 after cementing portion. 80*65=5200, 5200-cemented=3920, cemented=1280. Plausible." }, { "index": 1102, "id": 4033, "type": 2, "image": "/images/questions/imp4_question_image/imp4pg225q8.png", "question": "The rectangular field is 80 m long and 65 m wide. A worker cements a rectangular portion of the field to make a carpark.
The perimeter of the remaining field is m.", "answers": [ "290", null, null, null ], "correct_index": 290, "verdict": "GOOD", "notes": "Perimeter of remaining field (same figure as id=4032). ci=290 matches answer. Answer requires figure." }, { "index": 1103, "id": 4034, "type": 2, "image": "/images/questions/imp4_question_image/imp4pg226q1.png", "question": "A corner of a square piece of paper was folded as shown above.
The area of the paper is cm²", "answers": [ "121", null, null, null ], "correct_index": 121, "verdict": "GOOD", "notes": "Area of square paper after corner fold. ci=121 matches. If square, side=11. Answer requires figure." }, { "index": 1104, "id": 4035, "type": 2, "image": "/images/questions/imp4_question_image/imp4pg227q2.png", "question": "A corner of a rectangular piece of paper was folded.
Area of the paper is cm².", "answers": [ "126", null, null, null ], "correct_index": 126, "verdict": "GOOD", "notes": "Area of rectangular paper after corner fold. ci=126 matches answer. Answer requires figure." }, { "index": 1105, "id": 4036, "type": 2, "image": "/images/questions/imp4_question_image/imp4pg227q3.png", "question": "A sheet of paper was folded along one of the sides, as shown in the figure.
Area of the entire sheet of paper is cm².", "answers": [ "320", null, null, null ], "correct_index": 320, "verdict": "GOOD", "notes": "Area of entire sheet folded along side. ci=320 matches answer. Answer requires figure." }, { "index": 1106, "id": 4037, "type": 2, "image": "/images/questions/imp4_question_image/imp4pg227q4.png", "question": "A sheet of square paper was folded into half, as shown in the figure.
Area of the paper = cm².", "answers": [ "324", null, null, null ], "correct_index": 327, "verdict": "NEEDS_REVISION", "notes": "correct_index=327 does not match answer=\"324\". Off by 3. Square paper folded in half. Verify which value is correct from answer key." }, { "index": 1107, "id": 4048, "type": 1, "image": "/images/questions/imp4_question_image/imp4pg231q3F.png", "question": "Is this figure symmetric?", "answers": [ "Yes", "No", null, null ], "correct_index": 1, "verdict": "GOOD", "notes": "MCQ: Is letter F symmetric? ci=1 (No). F has no line of symmetry. CORRECT." }, { "index": 1108, "id": 4049, "type": 1, "image": "/images/questions/imp4_question_image/imp4pg231q3X.png", "question": "Is this symmetric?", "answers": [ "Yes", "No", null, null ], "correct_index": 0, "verdict": "GOOD", "notes": "MCQ: Is letter X symmetric? ci=0 (Yes). X has 4 lines of symmetry. CORRECT." }, { "index": 1109, "id": 4050, "type": 1, "image": "/images/questions/imp4_question_image/imp4pg231q3H.png", "question": "Is this symmetric?", "answers": [ "Yes", "No", null, null ], "correct_index": 0, "verdict": "GOOD", "notes": "MCQ: Is letter H symmetric? ci=0 (Yes). H has 2 lines of symmetry. CORRECT." }, { "index": 1110, "id": 4051, "type": 1, "image": "/images/questions/imp4_question_image/imp4pg231q3Q.png", "question": "Is this symmetric?", "answers": [ "Yes", "No", null, null ], "correct_index": 1, "verdict": "GOOD", "notes": "MCQ: Is letter Q symmetric? ci=1 (No). Q tail breaks symmetry. CORRECT." }, { "index": 1111, "id": 4052, "type": 1, "image": "/images/questions/imp4_question_image/imp4pg231q3G.png", "question": "Is this symmetric?", "answers": [ "Yes", "No", null, null ], "correct_index": 1, "verdict": "GOOD", "notes": "MCQ: Is letter G symmetric? ci=1 (No). G has no line of symmetry. CORRECT." }, { "index": 1112, "id": 4053, "type": 1, "image": "/images/questions/imp4_question_image/imp4pg231q3M.png", "question": "Is this symmetric?", "answers": [ "Yes", "No", null, null ], "correct_index": 0, "verdict": "GOOD", "notes": "MCQ: Is letter M symmetric? ci=0 (Yes). M has 1 vertical line of symmetry. CORRECT." }, { "index": 1113, "id": 4054, "type": 1, "image": "/images/questions/imp4_question_image/imp4pg231q3S.png", "question": "Is this symmetric?", "answers": [ "Yes", "No", null, null ], "correct_index": 1, "verdict": "GOOD", "notes": "MCQ: Is letter S symmetric? ci=1 (No). S has no line of symmetry. CORRECT." }, { "index": 1114, "id": 4055, "type": 1, "image": "/images/questions/imp4_question_image/imp4pg231q3N.png", "question": "Is this symmetric?", "answers": [ "Yes", "No", null, null ], "correct_index": 1, "verdict": "GOOD", "notes": "MCQ: Is letter N symmetric? ci=1 (No). N has no line of symmetry. CORRECT." }, { "index": 1115, "id": 4056, "type": 1, "image": "/images/questions/imp4_question_image/imp4pg231q4a.png", "question": "Is this symmetric?", "answers": [ "Yes", "No", null, null ], "correct_index": 0, "verdict": "GOOD", "notes": "MCQ: Is figure symmetric? ci=0 (Yes). Answer requires image to verify." }, { "index": 1116, "id": 4057, "type": 1, "image": "/images/questions/imp4_question_image/imp4pg231q4b.png", "question": "Is this symmetric?", "answers": [ "Yes", "No", null, null ], "correct_index": 0, "verdict": "GOOD", "notes": "MCQ: Is figure symmetric? ci=0 (Yes). Answer requires image to verify." }, { "index": 1117, "id": 4058, "type": 1, "image": "/images/questions/imp4_question_image/imp4pg231q4c.png", "question": "Is this symmetric?", "answers": [ "Yes", "No", null, null ], "correct_index": 1, "verdict": "GOOD", "notes": "MCQ: Is figure symmetric? ci=1 (No). Answer requires image to verify." }, { "index": 1118, "id": 4059, "type": 1, "image": "/images/questions/imp4_question_image/imp4pg231q4d.png", "question": "Is this symmetric?", "answers": [ "Yes", "No", null, null ], "correct_index": 0, "verdict": "GOOD", "notes": "MCQ: Is figure symmetric? ci=0 (Yes). Answer requires image to verify." }, { "index": 1119, "id": 4060, "type": 1, "image": "/images/questions/imp4_question_image/imp4pg231q5a.png", "question": "Is this symmetric?", "answers": [ "Yes", "No", null, null ], "correct_index": 0, "verdict": "GOOD", "notes": "MCQ: Is figure symmetric? ci=0 (Yes). Answer requires image to verify." }, { "index": 1120, "id": 4061, "type": 1, "image": "/images/questions/imp4_question_image/imp4pg231q5b.png", "question": "Is this symmetric?", "answers": [ "Yes", "No", null, null ], "correct_index": 1, "verdict": "GOOD", "notes": "MCQ: Is figure symmetric? ci=1 (No). Answer requires image to verify." }, { "index": 1121, "id": 4062, "type": 1, "image": "/images/questions/imp4_question_image/imp4pg231q5c.png", "question": "Is this symmetric?", "answers": [ "Yes", "No", null, null ], "correct_index": 1, "verdict": "GOOD", "notes": "MCQ: Is figure symmetric? ci=1 (No). Answer requires image to verify." }, { "index": 1122, "id": 4063, "type": 1, "image": "/images/questions/imp4_question_image/imp4pg231q5d.png", "question": "Is this symmetric?", "answers": [ "Yes", "No", null, null ], "correct_index": 1, "verdict": "GOOD", "notes": "MCQ: Is figure symmetric? ci=1 (No). Answer requires image to verify." }, { "index": 1123, "id": 4064, "type": 1, "image": "/images/questions/imp4_question_image/imp4pg231q5e.png", "question": "Is this symmetric?", "answers": [ "Yes", "No", null, null ], "correct_index": 0, "verdict": "GOOD", "notes": "MCQ: Is figure symmetric? ci=0 (Yes). Answer requires image to verify." }, { "index": 1124, "id": 4066, "type": 1, "image": "/images/questions/imp4_question_image/imp4pg232q2a.png", "question": "Is Line AB a line of symmetry?", "answers": [ "Yes", "No", null, null ], "correct_index": 0, "verdict": "GOOD", "notes": "MCQ: Is Line AB a line of symmetry? ci=0 (Yes). Answer requires image." }, { "index": 1125, "id": 4067, "type": 1, "image": "/images/questions/imp4_question_image/imp4pg232q2b.png", "question": "The two halves (do not fit / fit) exactly. Choose the correct answer.", "answers": [ "do not fit", "fit", null, null ], "correct_index": 0, "verdict": "GOOD", "notes": "MCQ: Halves do not fit/fit? ci=0 (do not fit). Paired with id=4068 (line CD is not symmetry). Consistent." }, { "index": 1126, "id": 4068, "type": 1, "image": "/images/questions/imp4_question_image/imp4pg232q2b.png", "question": "Line CD (is / is not) a line of symmetry. Choose the correct option.", "answers": [ "is", "is not", null, null ], "correct_index": 1, "verdict": "GOOD", "notes": "MCQ: Line CD is/is not symmetry? ci=1 (is not). Paired with id=4067 (halves do not fit). Consistent." }, { "index": 1127, "id": 4069, "type": 1, "image": "/images/questions/imp4_question_image/imp4pg232q2c.png", "question": "The two halves (do not fit/ ) exactly. Choose the correct option.", "answers": [ "do not fit", "fit", null, null ], "correct_index": 1, "verdict": "GOOD", "notes": "MCQ: Halves do not fit/fit? ci=1 (fit). Paired with id=4070 (line XY is symmetry). Consistent." }, { "index": 1128, "id": 4070, "type": 1, "image": "/images/questions/imp4_question_image/imp4pg232q2c.png", "question": "Line XY (is / is not) a line of symmetry. Choose the correct option.", "answers": [ "is", "is not", null, null ], "correct_index": 0, "verdict": "GOOD", "notes": "MCQ: Line XY is/is not symmetry? ci=0 (is). Paired with id=4069 (halves fit). Consistent." }, { "index": 1129, "id": 4071, "type": 1, "image": "/images/questions/imp4_question_image/imp4pg232q2d.png", "question": "The two halves (do not fit / fit) exactly. Choose the correct option.", "answers": [ "do not fit", "fit", null, null ], "correct_index": 0, "verdict": "GOOD", "notes": "MCQ: Halves do not fit/fit? ci=0 (do not fit). Paired with id=4072 (line ST is not symmetry). Consistent." }, { "index": 1130, "id": 4072, "type": 1, "image": "/images/questions/imp4_question_image/imp4pg232q2d.png", "question": "Line ST (is / is not) a line of symmetry. Choose the correct option.", "answers": [ "is", "is not", null, null ], "correct_index": 1, "verdict": "GOOD", "notes": "MCQ: Line ST is/is not symmetry? ci=1 (is not). Paired with id=4071 (halves do not fit). Consistent." }, { "index": 1131, "id": 4073, "type": 1, "image": "/images/questions/imp4_question_image/imp4pg233q7a.png", "question": "Is this the line of symmetry?", "answers": [ "Yes", "No", null, null ], "correct_index": 0, "verdict": "GOOD", "notes": "MCQ: Is this the line of symmetry? ci=0 (Yes). Answer requires image." }, { "index": 1132, "id": 4074, "type": 1, "image": "/images/questions/imp4_question_image/imp4pg233q7b.png", "question": "Is this the line of symmetry?", "answers": [ "Yes", "No", null, null ], "correct_index": 1, "verdict": "GOOD", "notes": "MCQ: Is this the line of symmetry? ci=1 (No). Answer requires image." }, { "index": 1133, "id": 4075, "type": 1, "image": "/images/questions/imp4_question_image/imp4pg233q7c.png", "question": "Is this the line of symmetry?", "answers": [ "Yes", "No", null, null ], "correct_index": 0, "verdict": "GOOD", "notes": "MCQ: Is this the line of symmetry? ci=0 (Yes). Answer requires image." }, { "index": 1134, "id": 4076, "type": 1, "image": "/images/questions/imp4_question_image/imp4pg233q7d.png", "question": "Is this the line of symmetry?", "answers": [ "Yes", "No", null, null ], "correct_index": 0, "verdict": "GOOD", "notes": "MCQ: Is this the line of symmetry? ci=0 (Yes). Answer requires image." }, { "index": 1135, "id": 4078, "type": 1, "image": "/images/questions/imp4_question_image/imp4pg237q4.png", "question": "What is the minimum number of squares that must be coloured to make the coloured figure symmetric?", "answers": [ "1", "2", "3", "4" ], "correct_index": 1, "verdict": "GOOD", "notes": "MCQ: Min squares to colour for symmetry? ci=1 (2 squares). Answer requires image." }, { "index": 1136, "id": 4083, "type": 1, "image": "/images/questions/imp4_question_image/imp4pg242q2.png", "question": "The figure shown is not symmetric. Which square box should I colour to make it symmetric?", "answers": [ "1", "2", "3", "4" ], "correct_index": 0, "verdict": "GOOD", "notes": "MCQ: Which square box to colour for symmetry? ci=0 (box 1). Answer requires image." }, { "index": 1137, "id": 4084, "type": 1, "image": "/images/questions/imp4_question_image/imp4pg242q3.png", "question": "The figure shown is not symmetric. Which 2 squares should I colour to make it symmetric?", "answers": [ "A and B", "B and C", "B and D", "None of the above" ], "correct_index": 2, "verdict": "GOOD", "notes": "MCQ: Which 2 squares for symmetry? ci=2 (B and D). Answer requires image." }, { "index": 1138, "id": 4085, "type": 1, "image": "/images/questions/imp4_question_image/imp4pg243q4.png", "question": "The figure shown is not symmetric. Which 2 squares do I colour to make it symmetric?", "answers": [ "B and D", "A and B", "C and D", "None of the above" ], "correct_index": 0, "verdict": "GOOD", "notes": "MCQ: Which 2 squares for symmetry? ci=0 (B and D). Answer requires image." }, { "index": 1139, "id": 4135, "type": 2, "image": "/images/questions/imp5_question_image/imp5pg006q6.png", "question": "The table below shows the rates for a three-day cruise from Singapore to Phuket.
Stewart brought his wife and three children, aged four, six and thirteen on the cruise and stayed in the Executive room.
He paid a total of $ .", "answers": [ "3000", null, null, null ], "correct_index": 3000, "verdict": "GOOD", "notes": "Cruise pricing FIB. ci=3000 matches answer. Answer requires rate table image to verify." }, { "index": 1140, "id": 4173, "type": 1, "image": "/images/questions/imp5_question_image/imp5pg016q14.png", "question": "Look at the pattern below.
What is the missing number?", "answers": [ "1", "2", "3", "4" ], "correct_index": 3, "verdict": "GOOD", "notes": "MCQ: Pattern missing number. ci=3 (answer 4). Answer requires pattern image to verify." }, { "index": 1141, "id": 4200, "type": 2, "image": "/images/questions/imp5_question_image/imp5pg027q13.png", "question": "In a school canteen, chairs are arranged around a rectangular table as shown below.
When 2 tables are joined together in a horizontal line, the chairs are arranged as shown below.
How many chairs are needed if 4 tables are joined together in a horizontal line?
How many chairs are needed if 15 tables are joined together in a horizontal line?
chairs are needed if 4 tables are joined.
chairs are needed if 15 tables are joined.", "answers": [ "26", "92", null, null ], "correct_index": 26, "verdict": "GOOD", "notes": "Multi-blank: chairs around joined tables. answers=[26,92]; ci=26 matches first blank. Pattern question; answer requires image." }, { "index": 1142, "id": 4201, "type": 2, "image": "/images/questions/imp5_question_image/imp5pg028q14.png", "question": "Look at the figures below which are formed by squares of the same size.
How many squares are there in Figure 5 : ?
Which figure will need 28 squares : ?
How many squares are there in Figure 14 : ?", "answers": [ "15", "7", "105", null ], "correct_index": 15, "verdict": "GOOD", "notes": "Multi-blank: squares in pattern figures. answers=[15,7,105]; ci=15 matches first blank. Answer requires image." }, { "index": 1143, "id": 4202, "type": 2, "image": "/images/questions/imp5_question_image/imp5pg029q15.png", "question": "Look at the figures below which are formed by squares of the same size.
How many squares are there in Figure 6?
Which figure will need 29 squares?
How many squares are there in Figure 20?
There are squares in Figure 6.
Figure will need 29 squares.
There are squares in Figure 20.", "answers": [ "17", "10", "59", null ], "correct_index": 17, "verdict": "GOOD", "notes": "Multi-blank: squares in pattern figures. answers=[17,10,59]; ci=17 matches first blank. Answer requires image." }, { "index": 1144, "id": 4290, "type": 1, "image": "/images/questions/imp5_question_image/imp5pg047q7.png", "question": "Find the perimeter of square STUV.", "answers": [ "26$$\\frac{1}{2}$$", "24$$\\frac{4}{5}$$", "23$$\\frac{11}{12}$$", "$$\\frac{4}{10}$$" ], "correct_index": 1, "verdict": "GOOD", "notes": "MCQ: Perimeter of square STUV. ci=1 (24 4/5). Answer requires figure for side length." }, { "index": 1145, "id": 4291, "type": 1, "image": "/images/questions/imp5_question_image/imp5pg048q10.png", "question": "In square ABCD below, DX = XC.
What fraction of square ABDC is shaded?", "answers": [ "$$\\frac{1}{7}$$", "$$\\frac{2}{5}$$", "$$\\frac{1}{8}$$", "$$\\frac{1}{4}$$" ], "correct_index": 3, "verdict": "NEEDS_REVISION", "notes": "NAMING INCONSISTENCY: question names square \"ABCD\" then refers to \"square ABDC\". ABDC is not standard vertex order for a square. ci=3 (1/4). Answer requires figure to verify." }, { "index": 1146, "id": 4292, "type": 1, "image": "/images/questions/imp5_question_image/imp5pg048q8.png", "question": "Find the perimeter of rectangle EFGH.", "answers": [ "3$$\\frac{5}{8}$$", "3$$\\frac{1}{2}$$", "2$$\\frac{2}{3}$$", "4$$\\frac{1}{2}$$" ], "correct_index": 2, "verdict": "GOOD", "notes": "MCQ: Perimeter of rectangle EFGH. ci=2 (2 2/3). Answer requires figure for dimensions." }, { "index": 1147, "id": 4293, "type": 1, "image": "/images/questions/imp5_question_image/imp5pg048q9.png", "question": "Find the perimeter of rectangle JKLM.", "answers": [ "14$$\\frac{2}{7}$$", "15$$\\frac{1}{10}$$", "15$$\\frac{3}{5}$$", "14$$\\frac{3}{8}$$" ], "correct_index": 1, "verdict": "GOOD", "notes": "MCQ: Perimeter of rectangle JKLM. ci=1 (15 1/10). Answer requires figure for dimensions." }, { "index": 1148, "id": 4392, "type": 2, "image": "/images/questions/imp5_question_image/imp5pg069q9.png", "question": "Find the difference between areas of the largest triangle and the smallest triangle.
The difference is $$cm^2$$.", "answers": [ "3", null, null, null ], "correct_index": 3, "verdict": "GOOD", "notes": "FIB: Difference between largest and smallest triangle areas. ci=3 matches answer. Answer requires figure." }, { "index": 1149, "id": 4394, "type": 2, "image": "/images/questions/imp5_question_image/imp5pg069q9.png", "question": "Find the area of each shaded triangle.
Area of triangle B = $$\\dfrac{2}{1}$$ x base x height = $$\\dfrac{2}{1}$$ x x = $cm^2$", "answers": [ "2", "5", "5", null ], "correct_index": 5, "verdict": "NEEDS_REVISION", "notes": "FORMULA ERROR: question text displays triangle area formula as 2/1 (twice) instead of 1/2. Answers [2,5,5] for base=2,height=5,area=5. Math is correct (1/2*2*5=5) but the displayed formula is wrong." }, { "index": 1150, "id": 4395, "type": 2, "image": "/images/questions/imp5_question_image/imp5pg069q9.png", "question": "Find the area of each shaded triangle.
Area of triangle C = $$\\dfrac{2}{1}$$ x base x height = $$\\dfrac{2}{1}$$ x x = $cm^2$", "answers": [ "2", "3", "3", null ], "correct_index": 2, "verdict": "NEEDS_REVISION", "notes": "FORMULA ERROR: question text displays triangle area formula as 2/1 instead of 1/2. Answers [2,3,3] for base=2,height=3,area=3. Math is correct (1/2*2*3=3) but the displayed formula is wrong." }, { "index": 1151, "id": 4396, "type": 2, "image": "/images/questions/imp5_question_image/imp5pg070q1a.png", "question": "Find the area of each shaded triangle. < hr> cm2cm^2cm2.", "answers": [ "6", null, null, null ], "correct_index": 6, "verdict": "NEEDS_REVISION", "notes": "HTML CORRUPTION: question text contains \"< hr>\" (double-encoded
tag). Should be \"
\". Also likely shares the 2/1 formula error from id=4394/4395." } ] }