Adam buys some stickers for his friends.
If he gives each of them 5 stickers, he needs another 7.
If he gives each of them 8 stickers, he needs another 19.
- How many friends are there?
- How many stickers does Adam buy?
(a)
Big difference
= 19 - 7
= 12
Small difference
= 8 - 5
= 3
Number of friends that Adam gives to
= 12 ÷ 3
= 4
(b)
Number of stickers that Adam buys
= 4 x 5 - 7
= 20 - 7
= 13
Answer(s): (a) 4; (b) 13