3 children have a total of 2100 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 = 2100
4 u = 2100 - 900
4 u = 1200
1 u = 1200 ÷ 4 = 300
Number of stickers that Bryan and Adam have
= 2 u + 1 u
= 3 u
= 3 x 300
= 900
(b)
Number of stickers that Adam has less than Bryan
= 2 u - 1u
= 1 u
= 1 x 300
= 300
(c)
Number of stickers that Adam has less than Bryan and Charlie
= (2 u + 1 u + 900) - 1 u
= 2 u + 900
= 2 x 300 + 900
= 600 + 900
= 1500
Answer(s); (a) 900; (b) 300; (c) 1500
