Adam buys some stickers for his friends.
If he gives each of them 7 stickers, he has 12 stickers left.
If he gives each of them 9 stickers, he has 6 stickers left.
- How many friends are there?
- How many stickers does Adam buy?
(a)
Big difference
= 12 - 6
= 6
Small difference
= 9 - 7
= 2
Number of friends that Adam gives to
= 6 ÷ 2
= 3
(b)
Number of stickers that Adam buys
= 3 x 7 + 12
= 21 + 12
= 33
Answer(s): (a) 3; (b) 33