3 children have a total of 1600 stickers.
Bryan has 2 times as many stickers as Adam.
Charlie has 900 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 + 900
Total number of stickers
= 1 u + 2 u + 1 u + 900
= 4 u + 900
4 u + 900 = 1600
4 u = 1600 - 900
4 u = 700
1 u = 700 ÷ 4 = 175
Number of stickers that Bryan and Adam have
= 2 u + 1 u
= 3 u
= 3 x 175
= 525
(b)
Number of stickers that Adam has less than Bryan
= 2 u - 1u
= 1 u
= 1 x 175
= 175
(c)
Number of stickers that Adam has less than Bryan and Charlie
= (2 u + 1 u + 900) - 1 u
= 2 u + 900
= 2 x 175 + 900
= 350 + 900
= 1250
Answer(s); (a) 525; (b) 175; (c) 1250