Adam buys some stickers for his friends.
If he gives each of them 9 stickers, he has 17 stickers left.
If he gives each of them 12 stickers, he has 5 stickers left.
- How many friends are there?
- How many stickers does Adam buy?
(a)
Big difference
= 17 - 5
= 12
Small difference
= 12 - 9
= 3
Number of friends that Adam gives to
= 12 ÷ 3
= 4
(b)
Number of stickers that Adam buys
= 4 x 9 + 17
= 36 + 17
= 53
Answer(s): (a) 4; (b) 53