Adam is 10 times as old as Bryan now.
In 29 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 16 years ago?
|
Adam |
Bryan |
Total |
Now |
10 u |
1 u |
11 u |
Change |
+ 29 |
+ 29 |
+ 58 |
29 years later |
10 u + 29 |
1 u + 29 |
80 |
(a)
Total age of Adam and Bryan now
= 80 - 58
= 22
Now
Adam's age = 10 u
Bryan's age = 1 u
Total age of Adam and Bryan = 11 u
11 u = 22
1 u = 22 ÷ 11 = 2
Bryan's age now
= 1 u
= 2
(b)
Number of years that Bryan is younger than Adam
= 10 u - 1 u
= 9 u
= 9 x 2
= 18
(c)
Adam's age 16 years' ago
= 10 u - 16
= 10 x 2 - 16
= 20 - 16
= 4
Answer(s): (a) 2; (b) 18; (c) 4