3 children have 1900 stickers.
Charlie has 400 more than Adam
but 800 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 + 800 = 1 u + 1200
Total number of stickers
= 1 u + 1 u + 400 + 1 u + 1200
= 3 u + 1600
3 u + 1600 = 1900
3 u = 1900 - 1600
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 + 1200
= 100 + 1200
= 1300
Answer(s): (a) 100; (b) 500; (c) 1300
