3 children have a total of 800 stickers.
Adam has 2 times as many stickers as Charlie.
Bryan has 300 stickers more stickers than Charlie.
- How many stickers do Adam and Charlie have?
- How many stickers does Charlie have less than Adam?
- How many stickers does Charlie have less than Adam and Bryan?
(a)
Choose the person with least stickers to be 1 u.
Number of stickers that Charlie has = 1 u
Number of stickers that Adam has = 2 u = 2 u
Number of stickers that Bryan has = 1 u + 300
Total number of stickers
= 1 u + 2 u + 1 u + 300
= 4 u + 300
4 u + 300 = 800
4 u = 800 - 300
4 u = 500
1 u = 500 ÷ 4 = 125
Number of stickers that Adam and Charlie have
= 2 u + 1 u
= 3 u
= 3 x 125
= 375
(b)
Number of stickers that Charlie has less than Adam
= 2 u - 1u
= 1 u
= 1 x 125
= 125
(c)
Number of stickers that Charlie has less than Adam and Bryan
= (2 u + 1 u + 300) - 1 u
= 2 u + 300
= 2 x 125 + 300
= 250 + 300
= 550
Answer(s); (a) 375; (b) 125; (c) 550