3 children have a total of 1300 stickers.
Charlie has 2 times as many stickers as Adam.
Bryan has 900 stickers more stickers than Adam.
- How many stickers do Charlie and Adam have?
- How many stickers does Adam have less than Charlie?
- How many stickers does Adam have less than Charlie and Bryan?
(a)
Choose the person with least stickers to be 1 u.
Number of stickers that Adam has = 1 u
Number of stickers that Charlie has = 2 u = 2 u
Number of stickers that Bryan has = 1 u + 900
Total number of stickers
= 1 u + 2 u + 1 u + 900
= 4 u + 900
4 u + 900 = 1300
4 u = 1300 - 900
4 u = 400
1 u = 400 ÷ 4 = 100
Number of stickers that Charlie and Adam have
= 2 u + 1 u
= 3 u
= 3 x 100
= 300
(b)
Number of stickers that Adam has less than Charlie
= 2 u - 1u
= 1 u
= 1 x 100
= 100
(c)
Number of stickers that Adam has less than Charlie and Bryan
= (2 u + 1 u + 900) - 1 u
= 2 u + 900
= 2 x 100 + 900
= 200 + 900
= 1100
Answer(s); (a) 300; (b) 100; (c) 1100