3 children have a total of 2400 stickers.
Bryan has 2 times as many stickers as Adam.
Charlie has 600 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 + 600
Total number of stickers
= 1 u + 2 u + 1 u + 600
= 4 u + 600
4 u + 600 = 2400
4 u = 2400 - 600
4 u = 1800
1 u = 1800 ÷ 4 = 450
Number of stickers that Bryan and Adam have
= 2 u + 1 u
= 3 u
= 3 x 450
= 1350
(b)
Number of stickers that Adam has less than Bryan
= 2 u - 1u
= 1 u
= 1 x 450
= 450
(c)
Number of stickers that Adam has less than Bryan and Charlie
= (2 u + 1 u + 600) - 1 u
= 2 u + 600
= 2 x 450 + 600
= 900 + 600
= 1500
Answer(s); (a) 1350; (b) 450; (c) 1500