3 children have a total of 1200 stickers.
Adam has 3 times as many stickers as Bryan.
Charlie has 300 stickers more stickers than Bryan.
- How many stickers do Adam and Bryan have?
- How many stickers does Bryan have less than Adam?
- How many stickers does Bryan have less than Adam and Charlie?
(a)
Choose the person with least stickers to be 1 u.
Number of stickers that Bryan has = 1 u
Number of stickers that Adam has = 3 u = 3 u
Number of stickers that Charlie has = 1 u + 300
Total number of stickers
= 1 u + 3 u + 1 u + 300
= 5 u + 300
5 u + 300 = 1200
5 u = 1200 - 300
5 u = 900
1 u = 900 ÷ 5 = 180
Number of stickers that Adam and Bryan have
= 3 u + 1 u
= 4 u
= 4 x 180
= 720
(b)
Number of stickers that Bryan has less than Adam
= 3 u - 1u
= 2 u
= 2 x 180
= 360
(c)
Number of stickers that Bryan has less than Adam and Charlie
= (3 u + 1 u + 300) - 1 u
= 3 u + 300
= 3 x 180 + 300
= 540 + 300
= 840
Answer(s); (a) 720; (b) 360; (c) 840