3 children have a total of 900 stickers.
Charlie has 2 times as many stickers as Bryan.
Adam has 500 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 = 2 u = 2 u
Number of stickers that Adam has = 1 u + 500
Total number of stickers
= 1 u + 2 u + 1 u + 500
= 4 u + 500
4 u + 500 = 900
4 u = 900 - 500
4 u = 400
1 u = 400 ÷ 4 = 100
Number of stickers that Charlie and Bryan have
= 2 u + 1 u
= 3 u
= 3 x 100
= 300
(b)
Number of stickers that Bryan has less than Charlie
= 2 u - 1u
= 1 u
= 1 x 100
= 100
(c)
Number of stickers that Bryan has less than Charlie and Adam
= (2 u + 1 u + 500) - 1 u
= 2 u + 500
= 2 x 100 + 500
= 200 + 500
= 700
Answer(s); (a) 300; (b) 100; (c) 700