Bryan is 3 times as old as Adam now.
In 9 years time, their total age is 70 years.
How old is Bryan now?
- How old is Adam now?
- How many years is Adam younger than Bryan?
- How old was Bryan 22 years ago?
|
Bryan |
Adam |
Total |
Now |
3 u |
1 u |
4 u |
Change |
+ 9 |
+ 9 |
+ 18 |
9 years later |
3 u + 9 |
1 u + 9 |
70 |
(a)
Total age of Bryan and Adam now
= 70 - 18
= 52
Now
Bryan's age = 3 u
Adam's age = 1 u
Total age of Bryan and Adam = 4 u
4 u = 52
1 u = 52 ÷ 4 = 13
Adam's age now
= 1 u
= 13
(b)
Number of years that Adam is younger than Bryan
= 3 u - 1 u
= 2 u
= 2 x 13
= 26
(c)
Bryan's age 22 years' ago
= 3 u - 22
= 3 x 13 - 22
= 39 - 22
= 17
Answer(s): (a) 13; (b) 26; (c) 17