Bryan is 7 times as old as Adam now.
In 12 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 39 years ago?
|
Bryan |
Adam |
Total |
Now |
7 u |
1 u |
8 u |
Change |
+ 12 |
+ 12 |
+ 24 |
12 years later |
7 u + 12 |
1 u + 12 |
80 |
(a)
Total age of Bryan and Adam now
= 80 - 24
= 56
Now
Bryan's age = 7 u
Adam's age = 1 u
Total age of Bryan and Adam = 8 u
8 u = 56
1 u = 56 ÷ 8 = 7
Adam's age now
= 1 u
= 7
(b)
Number of years that Adam is younger than Bryan
= 7 u - 1 u
= 6 u
= 6 x 7
= 42
(c)
Bryan's age 39 years' ago
= 7 u - 39
= 7 x 7 - 39
= 49 - 39
= 10
Answer(s): (a) 7; (b) 42; (c) 10