3 children have 1900 stickers.
Bryan has 100 more than Charlie
but 800 less than Adam.
- How many stickers does Charlie have?
- How many stickers does Bryan have?
- How many stickers does Adam have?
Choose the person with least stickers to be 1 u.
Number of stickers that Charlie has = 1 u
Number of stickers that Bryan has = 1 u + 100
Number of stickers that Adam has = 1 u + 100 + 800 = 1 u + 900
Total number of stickers
= 1 u + 1 u + 100 + 1 u + 900
= 3 u + 1000
3 u + 1000 = 1900
3 u = 1900 - 1000
3 u = 900
1 u = 900 ÷ 3 = 300
(a)
Number of stickers that Charlie has
= 1 u
= 300
(b)
Number of stickers that Bryan has
= 1 u + 100
= 300 + 100
= 400
(c)
Number of stickers that Adam has
= 1 u + 900
= 300 + 900
= 1200
Answer(s): (a) 300; (b) 400; (c) 1200
