Bryan is 3 times as old as Adam now.
In 6 years time, their total age is 100 years.
How old is Bryan now?
- How old is Adam now?
- How many years is Adam younger than Bryan?
- How old was Bryan 4 years ago?
|
Bryan |
Adam |
Total |
Now |
3 u |
1 u |
4 u |
Change |
+ 6 |
+ 6 |
+ 12 |
6 years later |
3 u + 6 |
1 u + 6 |
100 |
(a)
Total age of Bryan and Adam now
= 100 - 12
= 88
Now
Bryan's age = 3 u
Adam's age = 1 u
Total age of Bryan and Adam = 4 u
4 u = 88
1 u = 88 ÷ 4 = 22
Adam's age now
= 1 u
= 22
(b)
Number of years that Adam is younger than Bryan
= 3 u - 1 u
= 2 u
= 2 x 22
= 44
(c)
Bryan's age 4 years' ago
= 3 u - 4
= 3 x 22 - 4
= 66 - 4
= 62
Answer(s): (a) 22; (b) 44; (c) 62