Bryan is 5 times as old as Adam now.
In 3 years time, their total age is 90 years.
How old is Bryan now?
- How old is Adam now?
- How many years is Adam younger than Bryan?
- How old was Bryan 5 years ago?
|
Bryan |
Adam |
Total |
Now |
5 u |
1 u |
6 u |
Change |
+ 3 |
+ 3 |
+ 6 |
3 years later |
5 u + 3 |
1 u + 3 |
90 |
(a)
Total age of Bryan and Adam now
= 90 - 6
= 84
Now
Bryan's age = 5 u
Adam's age = 1 u
Total age of Bryan and Adam = 6 u
6 u = 84
1 u = 84 ÷ 6 = 14
Adam's age now
= 1 u
= 14
(b)
Number of years that Adam is younger than Bryan
= 5 u - 1 u
= 4 u
= 4 x 14
= 56
(c)
Bryan's age 5 years' ago
= 5 u - 5
= 5 x 14 - 5
= 70 - 5
= 65
Answer(s): (a) 14; (b) 56; (c) 65