Adam buys some stickers for his friends.
If he gives each of them 9 stickers, he has 16 stickers left.
If he gives each of them 12 stickers, he has 7 stickers left.
- How many friends are there?
- How many stickers does Adam buy?
(a)
Big difference
= 16 - 7
= 9
Small difference
= 12 - 9
= 3
Number of friends that Adam gives to
= 9 ÷ 3
= 3
(b)
Number of stickers that Adam buys
= 3 x 9 + 16
= 27 + 16
= 43
Answer(s): (a) 3; (b) 43