Bryan is 5 times as old as Adam now.
In 4 years time, their total age is 80 years.
How old is Bryan now?
- How old is Adam now?
- How many years is Adam younger than Bryan?
- How old was Bryan 19 years ago?
|
Bryan |
Adam |
Total |
Now |
5 u |
1 u |
6 u |
Change |
+ 4 |
+ 4 |
+ 8 |
4 years later |
5 u + 4 |
1 u + 4 |
80 |
(a)
Total age of Bryan and Adam now
= 80 - 8
= 72
Now
Bryan's age = 5 u
Adam's age = 1 u
Total age of Bryan and Adam = 6 u
6 u = 72
1 u = 72 ÷ 6 = 12
Adam's age now
= 1 u
= 12
(b)
Number of years that Adam is younger than Bryan
= 5 u - 1 u
= 4 u
= 4 x 12
= 48
(c)
Bryan's age 19 years' ago
= 5 u - 19
= 5 x 12 - 19
= 60 - 19
= 41
Answer(s): (a) 12; (b) 48; (c) 41