3 children have a total of 1400 stickers.
Charlie has 3 times as many stickers as Adam.
Bryan has 900 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 + 900
Total number of stickers
= 1 u + 3 u + 1 u + 900
= 5 u + 900
5 u + 900 = 1400
5 u = 1400 - 900
5 u = 500
1 u = 500 ÷ 5 = 100
Number of stickers that Charlie and Adam have
= 3 u + 1 u
= 4 u
= 4 x 100
= 400
(b)
Number of stickers that Adam has less than Charlie
= 3 u - 1u
= 2 u
= 2 x 100
= 200
(c)
Number of stickers that Adam has less than Charlie and Bryan
= (3 u + 1 u + 900) - 1 u
= 3 u + 900
= 3 x 100 + 900
= 300 + 900
= 1200
Answer(s); (a) 400; (b) 200; (c) 1200