Adam is 3 times as old as Bryan now.
In 6 years time, their total age is 80 years.
How old is Adam now?
- How old is Bryan now?
- How many years is Bryan younger than Adam?
- How old was Adam 33 years ago?
|
Adam |
Bryan |
Total |
Now |
3 u |
1 u |
4 u |
Change |
+ 6 |
+ 6 |
+ 12 |
6 years later |
3 u + 6 |
1 u + 6 |
80 |
(a)
Total age of Adam and Bryan now
= 80 - 12
= 68
Now
Adam's age = 3 u
Bryan's age = 1 u
Total age of Adam and Bryan = 4 u
4 u = 68
1 u = 68 ÷ 4 = 17
Bryan's age now
= 1 u
= 17
(b)
Number of years that Bryan is younger than Adam
= 3 u - 1 u
= 2 u
= 2 x 17
= 34
(c)
Adam's age 33 years' ago
= 3 u - 33
= 3 x 17 - 33
= 51 - 33
= 18
Answer(s): (a) 17; (b) 34; (c) 18