Bryan is 5 times as old as Adam now.
In 9 years time, their total age is 30 years.
How old is Bryan now?
- How old is Adam now?
- How many years is Adam younger than Bryan?
- How old was Bryan 6 years ago?
|
Bryan |
Adam |
Total |
Now |
5 u |
1 u |
6 u |
Change |
+ 9 |
+ 9 |
+ 18 |
9 years later |
5 u + 9 |
1 u + 9 |
30 |
(a)
Total age of Bryan and Adam now
= 30 - 18
= 12
Now
Bryan's age = 5 u
Adam's age = 1 u
Total age of Bryan and Adam = 6 u
6 u = 12
1 u = 12 ÷ 6 = 2
Adam's age now
= 1 u
= 2
(b)
Number of years that Adam is younger than Bryan
= 5 u - 1 u
= 4 u
= 4 x 2
= 8
(c)
Bryan's age 6 years' ago
= 5 u - 6
= 5 x 2 - 6
= 10 - 6
= 4
Answer(s): (a) 2; (b) 8; (c) 4