3 children have a total of 600 stickers.
Charlie has 3 times as many stickers as Bryan.
Adam has 400 stickers more stickers than Bryan.
- How many stickers do Charlie and Bryan have?
- How many stickers does Bryan have less than Charlie?
- How many stickers does Bryan have less than Charlie and Adam?
(a)
Choose the person with least stickers to be 1 u.
Number of stickers that Bryan has = 1 u
Number of stickers that Charlie has = 3 u = 3 u
Number of stickers that Adam has = 1 u + 400
Total number of stickers
= 1 u + 3 u + 1 u + 400
= 5 u + 400
5 u + 400 = 600
5 u = 600 - 400
5 u = 200
1 u = 200 ÷ 5 = 40
Number of stickers that Charlie and Bryan have
= 3 u + 1 u
= 4 u
= 4 x 40
= 160
(b)
Number of stickers that Bryan has less than Charlie
= 3 u - 1u
= 2 u
= 2 x 40
= 80
(c)
Number of stickers that Bryan has less than Charlie and Adam
= (3 u + 1 u + 400) - 1 u
= 3 u + 400
= 3 x 40 + 400
= 120 + 400
= 520
Answer(s); (a) 160; (b) 80; (c) 520