Adam buys some stickers for his friends.
If he gives each of them 9 stickers, he needs another 6.
If he gives each of them 11 stickers, he needs another 20.
- How many friends are there?
- How many stickers does Adam buy?
(a)
Big difference
= 20 - 6
= 14
Small difference
= 11 - 9
= 2
Number of friends that Adam gives to
= 14 ÷ 2
= 7
(b)
Number of stickers that Adam buys
= 7 x 9 - 6
= 63 - 6
= 57
Answer(s): (a) 7; (b) 57