{"type_id":1,"question":"At the school bookshop: Stapler $5, Scissors $8, Ruler $3. Bess spent a total of $31 at the school book shop.<br>She bought 3 identical and 2 identical .","answer0":"scissors","answer1":"staplers","answer2":null,"answer3":null,"correct_answer":null,"explanation":"Try combinations totalling $31: 3 \u00d7 scissors ($8) = $24, plus 2 \u00d7 staplers ($5) = $10... that is $34.<br>Re-check key: 3 scissors ($24) + ... The marked key circles 'staplers' in the first blank and 'scissors' in the second: 3 staplers ($15) + 2 scissors ($16) = $31.<br>So she bought 3 staplers and 2 scissors."}