Adam buys some stickers for his friends.
If he gives each of them 5 stickers, he needs another 10.
If he gives each of them 7 stickers, he needs another 18.
- How many friends are there?
- How many stickers does Adam buy?
(a)
Big difference
= 18 - 10
= 8
Small difference
= 7 - 5
= 2
Number of friends that Adam gives to
= 8 ÷ 2
= 4
(b)
Number of stickers that Adam buys
= 4 x 5 - 10
= 20 - 10
= 10
Answer(s): (a) 4; (b) 10