3 children have a total of 2100 stickers.
Adam has 4 times as many stickers as Bryan.
Charlie has 900 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 = 4 u = 4 u
Number of stickers that Charlie has = 1 u + 900
Total number of stickers
= 1 u + 4 u + 1 u + 900
= 6 u + 900
6 u + 900 = 2100
6 u = 2100 - 900
6 u = 1200
1 u = 1200 ÷ 6 = 200
Number of stickers that Adam and Bryan have
= 4 u + 1 u
= 5 u
= 5 x 200
= 1000
(b)
Number of stickers that Bryan has less than Adam
= 4 u - 1u
= 3 u
= 3 x 200
= 600
(c)
Number of stickers that Bryan has less than Adam and Charlie
= (4 u + 1 u + 900) - 1 u
= 4 u + 900
= 4 x 200 + 900
= 800 + 900
= 1700
Answer(s); (a) 1000; (b) 600; (c) 1700