Adam is 3 times as old as Bryan now.
In 16 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 32 years ago?
|
Adam |
Bryan |
Total |
Now |
3 u |
1 u |
4 u |
Change |
+ 16 |
+ 16 |
+ 32 |
16 years later |
3 u + 16 |
1 u + 16 |
100 |
(a)
Total age of Adam and Bryan now
= 100 - 32
= 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 32 years' ago
= 3 u - 32
= 3 x 17 - 32
= 51 - 32
= 19
Answer(s): (a) 17; (b) 34; (c) 19