Adam is 5 times as old as Bryan now.
In 7 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 15 years ago?
|
Adam |
Bryan |
Total |
Now |
5 u |
1 u |
6 u |
Change |
+ 7 |
+ 7 |
+ 14 |
7 years later |
5 u + 7 |
1 u + 7 |
80 |
(a)
Total age of Adam and Bryan now
= 80 - 14
= 66
Now
Adam's age = 5 u
Bryan's age = 1 u
Total age of Adam and Bryan = 6 u
6 u = 66
1 u = 66 ÷ 6 = 11
Bryan's age now
= 1 u
= 11
(b)
Number of years that Bryan is younger than Adam
= 5 u - 1 u
= 4 u
= 4 x 11
= 44
(c)
Adam's age 15 years' ago
= 5 u - 15
= 5 x 11 - 15
= 55 - 15
= 40
Answer(s): (a) 11; (b) 44; (c) 40