Adam buys some stickers for his friends.
If he gives each of them 10 stickers, he has 18 stickers left.
If he gives each of them 13 stickers, he has 3 stickers left.
- How many friends are there?
- How many stickers does Adam buy?
(a)
Big difference
= 18 - 3
= 15
Small difference
= 13 - 10
= 3
Number of friends that Adam gives to
= 15 ÷ 3
= 5
(b)
Number of stickers that Adam buys
= 5 x 10 + 18
= 50 + 18
= 68
Answer(s): (a) 5; (b) 68