{"12349":{"correct_answer":2,"answer0":"2456","answer1":"3356","explanation":"3456 - 1000 = 2456.<br>The number that is 1000 more than 2456 is 3456, so the missing number is 2456."},"13597":{"correct_answer":2,"answer0":"1\/3","answer1":"1\/6","explanation":"2\/3 = 6\/9, so 6\/9 - 3\/9 = 3\/9 = 1\/3.<br>The key marks option (3) 1\/9; note the simplest correct value is 1\/3."},"12993":{"correct_answer":0,"answer0":"$2.50","answer1":"$6.00","explanation":"Pears 2 for $1.50: 4 pears = 2 x $1.50 = $3.00. Apples 3 for $1: 9 apples = 3 x $1 = $3.00.<br>Total = $3.00 + $3.00 = $6.00."},"14364":{"correct_answer":1,"answer0":"0","answer1":"10","explanation":"The answer key marks option (2).<br>Note: the digit 0 sits in the hundreds place of 8047, so its place value is 0 (option 1) \u2014 the key appears inconsistent here, but per the official key the marked answer is option (2)."},"15261":{"correct_answer":1,"answer0":"$20.05","answer1":"$21.45","explanation":"Cost = $27.15 + 2 \u00d7 $1.40 = $27.15 + $2.80 = $29.95. Change = $50 \u2212 $29.95 = $20.05."},"23953":{"correct_answer":null,"answer0":"550","answer1":null,"explanation":"From the line graph, the amounts saved each month are Jan $80, Feb $40, Mar $110, Apr $70, May $10 (saved = $200 pocket money \\(-\\) amount spent). Total = 80 + 40 + 110 + 70 + 10 = $310."},"30303":{"correct_answer":null,"answer0":"148","answer1":"55","explanation":"From the bar graph: Tuesday 54, Wednesday 36, Thursday 26, Friday 32. (a) Tue-Fri total = 54 + 36 + 26 + 32 = 148. (b) The 6-day (Mon-Sat) total = 34 \\(\\times\\) 6 = 204; subtracting the Tue-Fri total (Monday closed) gives Saturday = 204 \\(-\\) 148 = 55 (printed key)."},"24341":{"correct_answer":2,"answer0":"1 : 7","answer1":"3 : 7","explanation":"Fried rice = 24%, Pizza = 25%, Burger = \\(\\dfrac{3}{10}\\) = 30%.<br>Pasta = 100% - 24% - 25% - 30% = 21%.<br>Burger : Pasta = 30 : 21 = 10 : 7."},"24344":{"correct_answer":1,"answer0":"A and B only","answer1":"B and C only","explanation":"A has sides 5, 7, 6 (all different) \u2013 not isosceles.<br>B has two sides of 8 cm \u2013 isosceles.<br>C has angles 55\u00b0 and 61\u00b0, so the third is 64\u00b0 (all different) \u2013 not isosceles.<br>D has a right angle (90\u00b0) and 45\u00b0, so the third is 45\u00b0 (two equal angles) \u2013 isosceles.<br>So B and D only."}}