Adam buys some stickers for his friends.
If he gives each of them 4 stickers, he has 4 stickers left.
If he gives each of them 7 stickers, he needs another 17.
- How many friends are there?
- How many stickers does Adam buy?
(a)
Big difference
= 4 + 17
= 21
Small difference
= 7 - 4
= 3
Number of friends that Adam gives to
= 21 ÷ 3
= 7
(b)
Number of stickers that Adam buys
= 7 x 4 + 4
= 28 + 4
= 32
Answer(s): (a) 7; (b) 32