John buys 12 pencils one week, and 7 the following week. He gives 3 pencils to his friend. How many pencils does he have left?
16
Lydia has 15 marbles. She takes them to her friend’s house. She loses 3 on the way and 4 in the house. How many does she have left?
8
Asif has a packet of biscuits. There are 12 in the packet. He gives 6 of the biscuits to some friends. He buys another packet of 12 biscuits. How many biscuits does he have now?
18
Amina collects 23 conkers. She gives 6 of the conkers to her brother and 8 to her sister. How many conkers does she have left?
9
A photographer takes 34 photographs in a day. She takes 13 in the morning and 12 in the afternoon. She takes the rest of the photographs in the evening. How many photographs does she take in the evening?
9