3 children have a total of 1200 stickers.
Charlie has 4 times as many stickers as Adam.
Bryan has 600 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 = 4 u = 4 u
Number of stickers that Bryan has = 1 u + 600
Total number of stickers
= 1 u + 4 u + 1 u + 600
= 6 u + 600
6 u + 600 = 1200
6 u = 1200 - 600
6 u = 600
1 u = 600 ÷ 6 = 100
Number of stickers that Charlie and Adam have
= 4 u + 1 u
= 5 u
= 5 x 100
= 500
(b)
Number of stickers that Adam has less than Charlie
= 4 u - 1u
= 3 u
= 3 x 100
= 300
(c)
Number of stickers that Adam has less than Charlie and Bryan
= (4 u + 1 u + 600) - 1 u
= 4 u + 600
= 4 x 100 + 600
= 400 + 600
= 1000
Answer(s); (a) 500; (b) 300; (c) 1000