3 children have a total of 2400 stickers.
Bryan has 2 times as many stickers as Charlie.
Adam has 800 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 + 800
Total number of stickers
= 1 u + 2 u + 1 u + 800
= 4 u + 800
4 u + 800 = 2400
4 u = 2400 - 800
4 u = 1600
1 u = 1600 ÷ 4 = 400
Number of stickers that Bryan and Charlie have
= 2 u + 1 u
= 3 u
= 3 x 400
= 1200
(b)
Number of stickers that Charlie has less than Bryan
= 2 u - 1u
= 1 u
= 1 x 400
= 400
(c)
Number of stickers that Charlie has less than Bryan and Adam
= (2 u + 1 u + 800) - 1 u
= 2 u + 800
= 2 x 400 + 800
= 800 + 800
= 1600
Answer(s); (a) 1200; (b) 400; (c) 1600