Adam is 3 times as old as Bryan now.
In 33 years time, their total age is 90 years.
How old is Adam now?
- How old is Bryan now?
- How many years is Bryan younger than Adam?
- How old was Adam 16 years ago?
|
Adam |
Bryan |
Total |
Now |
3 u |
1 u |
4 u |
Change |
+ 33 |
+ 33 |
+ 66 |
33 years later |
3 u + 33 |
1 u + 33 |
90 |
(a)
Total age of Adam and Bryan now
= 90 - 66
= 24
Now
Adam's age = 3 u
Bryan's age = 1 u
Total age of Adam and Bryan = 4 u
4 u = 24
1 u = 24 ÷ 4 = 6
Bryan's age now
= 1 u
= 6
(b)
Number of years that Bryan is younger than Adam
= 3 u - 1 u
= 2 u
= 2 x 6
= 12
(c)
Adam's age 16 years' ago
= 3 u - 16
= 3 x 6 - 16
= 18 - 16
= 2
Answer(s): (a) 6; (b) 12; (c) 2