3 children have 2000 stickers.
Charlie has 400 more than Adam
but 900 less than Bryan.
- How many stickers does Adam have?
- How many stickers does Charlie have?
- How many stickers does Bryan have?
Choose the person with least stickers to be 1 u.
Number of stickers that Adam has = 1 u
Number of stickers that Charlie has = 1 u + 400
Number of stickers that Bryan has = 1 u + 400 + 900 = 1 u + 1300
Total number of stickers
= 1 u + 1 u + 400 + 1 u + 1300
= 3 u + 1700
3 u + 1700 = 2000
3 u = 2000 - 1700
3 u = 300
1 u = 300 ÷ 3 = 100
(a)
Number of stickers that Adam has
= 1 u
= 100
(b)
Number of stickers that Charlie has
= 1 u + 400
= 100 + 400
= 500
(c)
Number of stickers that Bryan has
= 1 u + 1300
= 100 + 1300
= 1400
Answer(s): (a) 100; (b) 500; (c) 1400
