3 children have a total of 2400 stickers.
Bryan has 4 times as many stickers as Charlie.
Adam has 900 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 = 4 u = 4 u
Number of stickers that Adam has = 1 u + 900
Total number of stickers
= 1 u + 4 u + 1 u + 900
= 6 u + 900
6 u + 900 = 2400
6 u = 2400 - 900
6 u = 1500
1 u = 1500 ÷ 6 = 250
Number of stickers that Bryan and Charlie have
= 4 u + 1 u
= 5 u
= 5 x 250
= 1250
(b)
Number of stickers that Charlie has less than Bryan
= 4 u - 1u
= 3 u
= 3 x 250
= 750
(c)
Number of stickers that Charlie has less than Bryan and Adam
= (4 u + 1 u + 900) - 1 u
= 4 u + 900
= 4 x 250 + 900
= 1000 + 900
= 1900
Answer(s); (a) 1250; (b) 750; (c) 1900