3 children have a total of 1600 stickers.
Adam has 3 times as many stickers as Charlie.
Bryan has 600 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 = 3 u = 3 u
Number of stickers that Bryan has = 1 u + 600
Total number of stickers
= 1 u + 3 u + 1 u + 600
= 5 u + 600
5 u + 600 = 1600
5 u = 1600 - 600
5 u = 1000
1 u = 1000 ÷ 5 = 200
Number of stickers that Adam and Charlie have
= 3 u + 1 u
= 4 u
= 4 x 200
= 800
(b)
Number of stickers that Charlie has less than Adam
= 3 u - 1u
= 2 u
= 2 x 200
= 400
(c)
Number of stickers that Charlie has less than Adam and Bryan
= (3 u + 1 u + 600) - 1 u
= 3 u + 600
= 3 x 200 + 600
= 600 + 600
= 1200
Answer(s); (a) 800; (b) 400; (c) 1200