Adam buys some stickers for his friends.
If he gives each of them 9 stickers, he has 18 stickers left.
If he gives each of them 13 stickers, he has 2 stickers left.
- How many friends are there?
- How many stickers does Adam buy?
(a)
Big difference
= 18 - 2
= 16
Small difference
= 13 - 9
= 4
Number of friends that Adam gives to
= 16 ÷ 4
= 4
(b)
Number of stickers that Adam buys
= 4 x 9 + 18
= 36 + 18
= 54
Answer(s): (a) 4; (b) 54