3 children have a total of 2500 stickers.
Charlie has 3 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 = 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 = 2500
5 u = 2500 - 600
5 u = 1900
1 u = 1900 ÷ 5 = 380
Number of stickers that Charlie and Adam have
= 3 u + 1 u
= 4 u
= 4 x 380
= 1520
(b)
Number of stickers that Adam has less than Charlie
= 3 u - 1u
= 2 u
= 2 x 380
= 760
(c)
Number of stickers that Adam has less than Charlie and Bryan
= (3 u + 1 u + 600) - 1 u
= 3 u + 600
= 3 x 380 + 600
= 1140 + 600
= 1740
Answer(s); (a) 1520; (b) 760; (c) 1740