3 children have a total of 1300 stickers.
Charlie has 3 times as many stickers as Bryan.
Adam has 300 stickers more stickers than Bryan.
- How many stickers do Charlie and Bryan have?
- How many stickers does Bryan have less than Charlie?
- How many stickers does Bryan have less than Charlie and Adam?
(a)
Choose the person with least stickers to be 1 u.
Number of stickers that Bryan has = 1 u
Number of stickers that Charlie 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 = 1300
5 u = 1300 - 300
5 u = 1000
1 u = 1000 ÷ 5 = 200
Number of stickers that Charlie and Bryan have
= 3 u + 1 u
= 4 u
= 4 x 200
= 800
(b)
Number of stickers that Bryan has less than Charlie
= 3 u - 1u
= 2 u
= 2 x 200
= 400
(c)
Number of stickers that Bryan has less than Charlie and Adam
= (3 u + 1 u + 300) - 1 u
= 3 u + 300
= 3 x 200 + 300
= 600 + 300
= 900
Answer(s); (a) 800; (b) 400; (c) 900