3 children have a total of 800 stickers.
Bryan has 3 times as many stickers as Charlie.
Adam has 300 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 = 3 u = 3 u
Number of stickers that Adam has = 1 u + 300
Total number of stickers
= 1 u + 3 u + 1 u + 300
= 5 u + 300
5 u + 300 = 800
5 u = 800 - 300
5 u = 500
1 u = 500 ÷ 5 = 100
Number of stickers that Bryan and Charlie have
= 3 u + 1 u
= 4 u
= 4 x 100
= 400
(b)
Number of stickers that Charlie has less than Bryan
= 3 u - 1u
= 2 u
= 2 x 100
= 200
(c)
Number of stickers that Charlie has less than Bryan and Adam
= (3 u + 1 u + 300) - 1 u
= 3 u + 300
= 3 x 100 + 300
= 300 + 300
= 600
Answer(s); (a) 400; (b) 200; (c) 600