3 children have a total of 1800 stickers.
Charlie has 5 times as many stickers as Adam.
Bryan has 400 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 = 5 u = 5 u
Number of stickers that Bryan has = 1 u + 400
Total number of stickers
= 1 u + 5 u + 1 u + 400
= 7 u + 400
7 u + 400 = 1800
7 u = 1800 - 400
7 u = 1400
1 u = 1400 ÷ 7 = 200
Number of stickers that Charlie and Adam have
= 5 u + 1 u
= 6 u
= 6 x 200
= 1200
(b)
Number of stickers that Adam has less than Charlie
= 5 u - 1u
= 4 u
= 4 x 200
= 800
(c)
Number of stickers that Adam has less than Charlie and Bryan
= (5 u + 1 u + 400) - 1 u
= 5 u + 400
= 5 x 200 + 400
= 1000 + 400
= 1400
Answer(s); (a) 1200; (b) 800; (c) 1400