Adam is 3 times as old as Bryan now.
In 5 years time, their total age is 30 years.
How old is Adam now?
- How old is Bryan now?
- How many years is Bryan younger than Adam?
- How old was Adam 2 years ago?
|
Adam |
Bryan |
Total |
Now |
3 u |
1 u |
4 u |
Change |
+ 5 |
+ 5 |
+ 10 |
5 years later |
3 u + 5 |
1 u + 5 |
30 |
(a)
Total age of Adam and Bryan now
= 30 - 10
= 20
Now
Adam's age = 3 u
Bryan's age = 1 u
Total age of Adam and Bryan = 4 u
4 u = 20
1 u = 20 ÷ 4 = 5
Bryan's age now
= 1 u
= 5
(b)
Number of years that Bryan is younger than Adam
= 3 u - 1 u
= 2 u
= 2 x 5
= 10
(c)
Adam's age 2 years' ago
= 3 u - 2
= 3 x 5 - 2
= 15 - 2
= 13
Answer(s): (a) 5; (b) 10; (c) 13