Level 1
There are 40 pupils in a class. The pupils are divided into groups consisting of 3 boys and 5 girls in each group. How many boys are there in the class?
Level 2
At a buffet promotion, for every 2 paying adults, the third adult gets to dine for free. Mr Chia dined with 13 friends at the restaurant. How many of them dined for free?
Level 2
During a promotion at a bird park, for every 4 visitors, the 5th visitor will be given a free admission ticket. How many free tickets will be given to a group of 46 visitors?
Level 2
Mary bought some correction tapes and stickers for $43. She bought more correction tapes than pens and paid $15 for the additional correction tapes. If 1 correction tape and 1 pen cost $7, how many pens did she buy?