3 children have a total of 2000 stickers.
Adam has 3 times as many stickers as Bryan.
Charlie has 900 stickers more stickers than Bryan.
- How many stickers do Adam and Bryan have?
- How many stickers does Bryan have less than Adam?
- How many stickers does Bryan have less than Adam and Charlie?
(a)
Choose the person with least stickers to be 1 u.
Number of stickers that Bryan has = 1 u
Number of stickers that Adam has = 3 u = 3 u
Number of stickers that Charlie has = 1 u + 900
Total number of stickers
= 1 u + 3 u + 1 u + 900
= 5 u + 900
5 u + 900 = 2000
5 u = 2000 - 900
5 u = 1100
1 u = 1100 ÷ 5 = 220
Number of stickers that Adam and Bryan have
= 3 u + 1 u
= 4 u
= 4 x 220
= 880
(b)
Number of stickers that Bryan has less than Adam
= 3 u - 1u
= 2 u
= 2 x 220
= 440
(c)
Number of stickers that Bryan has less than Adam and Charlie
= (3 u + 1 u + 900) - 1 u
= 3 u + 900
= 3 x 220 + 900
= 660 + 900
= 1560
Answer(s); (a) 880; (b) 440; (c) 1560