Adam is 2 times as old as Bryan now.
In 5 years time, their total age is 100 years.
How old is Adam now?
- How old is Bryan now?
- How many years is Bryan younger than Adam?
- How old was Adam 6 years ago?
|
Adam |
Bryan |
Total |
Now |
2 u |
1 u |
3 u |
Change |
+ 5 |
+ 5 |
+ 10 |
5 years later |
2 u + 5 |
1 u + 5 |
100 |
(a)
Total age of Adam and Bryan now
= 100 - 10
= 90
Now
Adam's age = 2 u
Bryan's age = 1 u
Total age of Adam and Bryan = 3 u
3 u = 90
1 u = 90 ÷ 3 = 30
Bryan's age now
= 1 u
= 30
(b)
Number of years that Bryan is younger than Adam
= 2 u - 1 u
= 1 u
= 1 x 30
= 30
(c)
Adam's age 6 years' ago
= 2 u - 6
= 2 x 30 - 6
= 60 - 6
= 54
Answer(s): (a) 30; (b) 30; (c) 54