3 children have a total of 800 stickers.
Adam has 2 times as many stickers as Bryan.
Charlie has 200 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 = 2 u = 2 u
Number of stickers that Charlie has = 1 u + 200
Total number of stickers
= 1 u + 2 u + 1 u + 200
= 4 u + 200
4 u + 200 = 800
4 u = 800 - 200
4 u = 600
1 u = 600 ÷ 4 = 150
Number of stickers that Adam and Bryan have
= 2 u + 1 u
= 3 u
= 3 x 150
= 450
(b)
Number of stickers that Bryan has less than Adam
= 2 u - 1u
= 1 u
= 1 x 150
= 150
(c)
Number of stickers that Bryan has less than Adam and Charlie
= (2 u + 1 u + 200) - 1 u
= 2 u + 200
= 2 x 150 + 200
= 300 + 200
= 500
Answer(s); (a) 450; (b) 150; (c) 500