3 children have a total of 2100 stickers.
Charlie has 2 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 = 2 u = 2 u
Number of stickers that Bryan has = 1 u + 600
Total number of stickers
= 1 u + 2 u + 1 u + 600
= 4 u + 600
4 u + 600 = 2100
4 u = 2100 - 600
4 u = 1500
1 u = 1500 ÷ 4 = 375
Number of stickers that Charlie and Adam have
= 2 u + 1 u
= 3 u
= 3 x 375
= 1125
(b)
Number of stickers that Adam has less than Charlie
= 2 u - 1u
= 1 u
= 1 x 375
= 375
(c)
Number of stickers that Adam has less than Charlie and Bryan
= (2 u + 1 u + 600) - 1 u
= 2 u + 600
= 2 x 375 + 600
= 750 + 600
= 1350
Answer(s); (a) 1125; (b) 375; (c) 1350