3 children have a total of 1800 stickers.
Bryan has 2 times as many stickers as Charlie.
Adam has 400 stickers more stickers than Charlie.
- How many stickers do Bryan and Charlie have?
- How many stickers does Charlie have less than Bryan?
- How many stickers does Charlie have less than Bryan and Adam?
(a)
Choose the person with least stickers to be 1 u.
Number of stickers that Charlie has = 1 u
Number of stickers that Bryan has = 2 u = 2 u
Number of stickers that Adam has = 1 u + 400
Total number of stickers
= 1 u + 2 u + 1 u + 400
= 4 u + 400
4 u + 400 = 1800
4 u = 1800 - 400
4 u = 1400
1 u = 1400 ÷ 4 = 350
Number of stickers that Bryan and Charlie have
= 2 u + 1 u
= 3 u
= 3 x 350
= 1050
(b)
Number of stickers that Charlie has less than Bryan
= 2 u - 1u
= 1 u
= 1 x 350
= 350
(c)
Number of stickers that Charlie has less than Bryan and Adam
= (2 u + 1 u + 400) - 1 u
= 2 u + 400
= 2 x 350 + 400
= 700 + 400
= 1100
Answer(s); (a) 1050; (b) 350; (c) 1100