Adam has 100 stickers more than Bryan.
After he gives away 90 stickers,
Adam has 3 times as many stickers as Bryan.
- How many stickers does Bryan have?
- How many stickers does Adam have at first?
- How many stickers do they have altogether at first?
- How many stickers do they have altogether in the end?
|
Adam |
Bryan |
Before |
1 u + 100 |
1 u |
Change |
- 90 |
No change |
After |
3 u |
1 u |
(a)
The number of stickers Bryan has at first and in the end remains unchanged.
Make the number of stickers Bryan has the same using LCM of 1 and 1.
LCM of 1 and 1 = 1
1 u + 100 - 90 = 3 u
1 u + 10 = 3 u
3 u - 1 u = 10
2 u = 10
1 u = 10 ÷ 2 = 5
Number of stickers that Bryan has
= 1 u
= 5
(b)
Number of stickers that Adam has at first
= 1 u + 100
= 5 + 100
= 105
(c)
Number of stickers that they have altogether at first
= 1 u + 1 u + 100
= 2 u + 100
= 2 x 5 + 100
= 10 + 100
= 110
(d)
Number of stickers that they have altogether in the end
= 3 u + 1 u
= 4 u
= 4 x 5
= 20
Answer(s): (a) 5; (b) 105; (c) 110; (d) 20