3 children have a total of 1000 stickers.
Charlie has 2 times as many stickers as Adam.
Bryan has 400 stickers more stickers than Adam.
- How many stickers do Charlie and Adam have?
- How many stickers does Adam have less than Charlie?
- How many stickers does Adam have less than Charlie and Bryan?
(a)
Choose the person with least stickers to be 1 u.
Number of stickers that Adam has = 1 u
Number of stickers that Charlie has = 2 u = 2 u
Number of stickers that Bryan has = 1 u + 400
Total number of stickers
= 1 u + 2 u + 1 u + 400
= 4 u + 400
4 u + 400 = 1000
4 u = 1000 - 400
4 u = 600
1 u = 600 ÷ 4 = 150
Number of stickers that Charlie and Adam have
= 2 u + 1 u
= 3 u
= 3 x 150
= 450
(b)
Number of stickers that Adam has less than Charlie
= 2 u - 1u
= 1 u
= 1 x 150
= 150
(c)
Number of stickers that Adam has less than Charlie and Bryan
= (2 u + 1 u + 400) - 1 u
= 2 u + 400
= 2 x 150 + 400
= 300 + 400
= 700
Answer(s); (a) 450; (b) 150; (c) 700
