Adam buys some stickers for his friends.
If he gives each of them 9 stickers, he has 19 stickers left.
If he gives each of them 11 stickers, he has 5 stickers left.
- How many friends are there?
- How many stickers does Adam buy?
(a)
Big difference
= 19 - 5
= 14
Small difference
= 11 - 9
= 2
Number of friends that Adam gives to
= 14 ÷ 2
= 7
(b)
Number of stickers that Adam buys
= 7 x 9 + 19
= 63 + 19
= 82
Answer(s): (a) 7; (b) 82