Adam buys some stickers for his friends.
If he gives each of them 9 stickers, he has 3 stickers left.
If he gives each of them 13 stickers, he needs another 17.
- How many friends are there?
- How many stickers does Adam buy?
(a)
Big difference
= 3 + 17
= 20
Small difference
= 13 - 9
= 4
Number of friends that Adam gives to
= 20 ÷ 4
= 5
(b)
Number of stickers that Adam buys
= 5 x 9 + 3
= 45 + 3
= 48
Answer(s): (a) 5; (b) 48