3 children have a total of 1700 stickers.
Adam has 2 times as many stickers as Charlie.
Bryan has 900 stickers more stickers than Charlie.
- How many stickers do Adam and Charlie have?
- How many stickers does Charlie have less than Adam?
- How many stickers does Charlie have less than Adam and Bryan?
(a)
Choose the person with least stickers to be 1 u.
Number of stickers that Charlie has = 1 u
Number of stickers that Adam 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 = 1700
4 u = 1700 - 900
4 u = 800
1 u = 800 ÷ 4 = 200
Number of stickers that Adam and Charlie have
= 2 u + 1 u
= 3 u
= 3 x 200
= 600
(b)
Number of stickers that Charlie has less than Adam
= 2 u - 1u
= 1 u
= 1 x 200
= 200
(c)
Number of stickers that Charlie has less than Adam and Bryan
= (2 u + 1 u + 900) - 1 u
= 2 u + 900
= 2 x 200 + 900
= 400 + 900
= 1300
Answer(s); (a) 600; (b) 200; (c) 1300