3 children have a total of 2500 stickers.
Bryan has 5 times as many stickers as Adam.
Charlie has 400 stickers more stickers than Adam.
- How many stickers do Bryan and Adam have?
- How many stickers does Adam have less than Bryan?
- How many stickers does Adam have less than Bryan and Charlie?
(a)
Choose the person with least stickers to be 1 u.
Number of stickers that Adam has = 1 u
Number of stickers that Bryan has = 5 u = 5 u
Number of stickers that Charlie has = 1 u + 400
Total number of stickers
= 1 u + 5 u + 1 u + 400
= 7 u + 400
7 u + 400 = 2500
7 u = 2500 - 400
7 u = 2100
1 u = 2100 ÷ 7 = 300
Number of stickers that Bryan and Adam have
= 5 u + 1 u
= 6 u
= 6 x 300
= 1800
(b)
Number of stickers that Adam has less than Bryan
= 5 u - 1u
= 4 u
= 4 x 300
= 1200
(c)
Number of stickers that Adam has less than Bryan and Charlie
= (5 u + 1 u + 400) - 1 u
= 5 u + 400
= 5 x 300 + 400
= 1500 + 400
= 1900
Answer(s); (a) 1800; (b) 1200; (c) 1900