3 children have a total of 1900 stickers.
Charlie has 4 times as many stickers as Bryan.
Adam has 100 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 = 4 u = 4 u
Number of stickers that Adam has = 1 u + 100
Total number of stickers
= 1 u + 4 u + 1 u + 100
= 6 u + 100
6 u + 100 = 1900
6 u = 1900 - 100
6 u = 1800
1 u = 1800 ÷ 6 = 300
Number of stickers that Charlie and Bryan have
= 4 u + 1 u
= 5 u
= 5 x 300
= 1500
(b)
Number of stickers that Bryan has less than Charlie
= 4 u - 1u
= 3 u
= 3 x 300
= 900
(c)
Number of stickers that Bryan has less than Charlie and Adam
= (4 u + 1 u + 100) - 1 u
= 4 u + 100
= 4 x 300 + 100
= 1200 + 100
= 1300
Answer(s); (a) 1500; (b) 900; (c) 1300