3 children have a total of 1600 stickers.
Bryan has 3 times as many stickers as Adam.
Charlie has 200 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 = 3 u = 3 u
Number of stickers that Charlie has = 1 u + 200
Total number of stickers
= 1 u + 3 u + 1 u + 200
= 5 u + 200
5 u + 200 = 1600
5 u = 1600 - 200
5 u = 1400
1 u = 1400 ÷ 5 = 280
Number of stickers that Bryan and Adam have
= 3 u + 1 u
= 4 u
= 4 x 280
= 1120
(b)
Number of stickers that Adam has less than Bryan
= 3 u - 1u
= 2 u
= 2 x 280
= 560
(c)
Number of stickers that Adam has less than Bryan and Charlie
= (3 u + 1 u + 200) - 1 u
= 3 u + 200
= 3 x 280 + 200
= 840 + 200
= 1040
Answer(s); (a) 1120; (b) 560; (c) 1040