Adam buys some stickers for his friends.
If he gives each of them 10 stickers, he has 20 stickers left.
If he gives each of them 13 stickers, he has 11 stickers left.
- How many friends are there?
- How many stickers does Adam buy?
(a)
Big difference
= 20 - 11
= 9
Small difference
= 13 - 10
= 3
Number of friends that Adam gives to
= 9 ÷ 3
= 3
(b)
Number of stickers that Adam buys
= 3 x 10 + 20
= 30 + 20
= 50
Answer(s): (a) 3; (b) 50