Bryan is 5 times as old as Adam now.
In 8 years time, their total age is 40 years.
How old is Bryan now?
- How old is Adam now?
- How many years is Adam younger than Bryan?
- How old was Bryan 18 years ago?
|
Bryan |
Adam |
Total |
Now |
5 u |
1 u |
6 u |
Change |
+ 8 |
+ 8 |
+ 16 |
8 years later |
5 u + 8 |
1 u + 8 |
40 |
(a)
Total age of Bryan and Adam now
= 40 - 16
= 24
Now
Bryan's age = 5 u
Adam's age = 1 u
Total age of Bryan and Adam = 6 u
6 u = 24
1 u = 24 ÷ 6 = 4
Adam's age now
= 1 u
= 4
(b)
Number of years that Adam is younger than Bryan
= 5 u - 1 u
= 4 u
= 4 x 4
= 16
(c)
Bryan's age 18 years' ago
= 5 u - 18
= 5 x 4 - 18
= 20 - 18
= 2
Answer(s): (a) 4; (b) 16; (c) 2