3 children have a total of 800 stickers.
Bryan has 2 times as many stickers as Adam.
Charlie has 400 stickers more stickers than Adam.
- How many stickers do Bryan and Adam have?
- How many stickers does Adam have less than Bryan?
- How many stickers does Adam have less than Bryan and Charlie?
(a)
Choose the person with least stickers to be 1 u.
Number of stickers that Adam has = 1 u
Number of stickers that Bryan has = 2 u = 2 u
Number of stickers that Charlie has = 1 u + 400
Total number of stickers
= 1 u + 2 u + 1 u + 400
= 4 u + 400
4 u + 400 = 800
4 u = 800 - 400
4 u = 400
1 u = 400 ÷ 4 = 100
Number of stickers that Bryan and Adam have
= 2 u + 1 u
= 3 u
= 3 x 100
= 300
(b)
Number of stickers that Adam has less than Bryan
= 2 u - 1u
= 1 u
= 1 x 100
= 100
(c)
Number of stickers that Adam has less than Bryan and Charlie
= (2 u + 1 u + 400) - 1 u
= 2 u + 400
= 2 x 100 + 400
= 200 + 400
= 600
Answer(s); (a) 300; (b) 100; (c) 600