Adam buys some stickers for his friends.
If he gives each of them 9 stickers, he needs another 4.
If he gives each of them 13 stickers, he needs another 16.
- How many friends are there?
- How many stickers does Adam buy?
(a)
Big difference
= 16 - 4
= 12
Small difference
= 13 - 9
= 4
Number of friends that Adam gives to
= 12 ÷ 4
= 3
(b)
Number of stickers that Adam buys
= 3 x 9 - 4
= 27 - 4
= 23
Answer(s): (a) 3; (b) 23