3 children have a total of 1900 stickers.
Bryan has 3 times as many stickers as Charlie.
Adam has 100 stickers more stickers than Charlie.
- How many stickers do Bryan and Charlie have?
- How many stickers does Charlie have less than Bryan?
- How many stickers does Charlie have less than Bryan and Adam?
(a)
Choose the person with least stickers to be 1 u.
Number of stickers that Charlie has = 1 u
Number of stickers that Bryan has = 3 u = 3 u
Number of stickers that Adam has = 1 u + 100
Total number of stickers
= 1 u + 3 u + 1 u + 100
= 5 u + 100
5 u + 100 = 1900
5 u = 1900 - 100
5 u = 1800
1 u = 1800 ÷ 5 = 360
Number of stickers that Bryan and Charlie have
= 3 u + 1 u
= 4 u
= 4 x 360
= 1440
(b)
Number of stickers that Charlie has less than Bryan
= 3 u - 1u
= 2 u
= 2 x 360
= 720
(c)
Number of stickers that Charlie has less than Bryan and Adam
= (3 u + 1 u + 100) - 1 u
= 3 u + 100
= 3 x 360 + 100
= 1080 + 100
= 1180
Answer(s); (a) 1440; (b) 720; (c) 1180