Adam is 5 times as old as Bryan now.
In 13 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 23 years ago?
|
Adam |
Bryan |
Total |
Now |
5 u |
1 u |
6 u |
Change |
+ 13 |
+ 13 |
+ 26 |
13 years later |
5 u + 13 |
1 u + 13 |
80 |
(a)
Total age of Adam and Bryan now
= 80 - 26
= 54
Now
Adam's age = 5 u
Bryan's age = 1 u
Total age of Adam and Bryan = 6 u
6 u = 54
1 u = 54 ÷ 6 = 9
Bryan's age now
= 1 u
= 9
(b)
Number of years that Bryan is younger than Adam
= 5 u - 1 u
= 4 u
= 4 x 9
= 36
(c)
Adam's age 23 years' ago
= 5 u - 23
= 5 x 9 - 23
= 45 - 23
= 22
Answer(s): (a) 9; (b) 36; (c) 22