Adam buys some stickers for his friends.
If he gives each of them 6 stickers, he needs another 9.
If he gives each of them 9 stickers, he needs another 18.
- How many friends are there?
- How many stickers does Adam buy?
(a)
Big difference
= 18 - 9
= 9
Small difference
= 9 - 6
= 3
Number of friends that Adam gives to
= 9 ÷ 3
= 3
(b)
Number of stickers that Adam buys
= 3 x 6 - 9
= 18 - 9
= 9
Answer(s): (a) 3; (b) 9