Adam buys some stickers for his friends.
If he gives each of them 7 stickers, he needs another 7.
If he gives each of them 11 stickers, he needs another 19.
- How many friends are there?
- How many stickers does Adam buy?
(a)
Big difference
= 19 - 7
= 12
Small difference
= 11 - 7
= 4
Number of friends that Adam gives to
= 12 ÷ 4
= 3
(b)
Number of stickers that Adam buys
= 3 x 7 - 7
= 21 - 7
= 14
Answer(s): (a) 3; (b) 14