Level 3
Micah has some money. She spends $16 on some school supplies and twice as much on a school bag. If she has $45 in the end, how much did Micah have at first?
Level 3
Mrs Tan has 24 pupils in her class. She wants them to work in groups for an activity. What is the total number of different ways that she can arrange her pupils, so that each group has the same number of pupils?
Level 4 Carla counted the wheels of the cars and bicycles which passed by her while she was waiting for a bus. By the time she counted 38 wheels. How many possibilities are there of each type of vehicles that could have passed by her?