Adam buys some stickers for his friends.
If he gives each of them 7 stickers, he needs another 4.
If he gives each of them 10 stickers, he needs another 19.
- How many friends are there?
- How many stickers does Adam buy?
(a)
Big difference
= 19 - 4
= 15
Small difference
= 10 - 7
= 3
Number of friends that Adam gives to
= 15 ÷ 3
= 5
(b)
Number of stickers that Adam buys
= 5 x 7 - 4
= 35 - 4
= 31
Answer(s): (a) 5; (b) 31