3 children have 1900 stickers.
Charlie has 200 more than Bryan
but 300 less than Adam.
- How many stickers does Bryan have?
- How many stickers does Charlie have?
- How many stickers does Adam have?
Choose the person with least stickers to be 1 u.
Number of stickers that Bryan has = 1 u
Number of stickers that Charlie has = 1 u + 200
Number of stickers that Adam has = 1 u + 200 + 300 = 1 u + 500
Total number of stickers
= 1 u + 1 u + 200 + 1 u + 500
= 3 u + 700
3 u + 700 = 1900
3 u = 1900 - 700
3 u = 1200
1 u = 1200 ÷ 3 = 400
(a)
Number of stickers that Bryan has
= 1 u
= 400
(b)
Number of stickers that Charlie has
= 1 u + 200
= 400 + 200
= 600
(c)
Number of stickers that Adam has
= 1 u + 500
= 400 + 500
= 900
Answer(s): (a) 400; (b) 600; (c) 900
