Adam is 7 times as old as Bryan now.
In 9 years time, their total age is 50 years.
How old is Adam now?
- How old is Bryan now?
- How many years is Bryan younger than Adam?
- How old was Adam 12 years ago?
|
Adam |
Bryan |
Total |
Now |
7 u |
1 u |
8 u |
Change |
+ 9 |
+ 9 |
+ 18 |
9 years later |
7 u + 9 |
1 u + 9 |
50 |
(a)
Total age of Adam and Bryan now
= 50 - 18
= 32
Now
Adam's age = 7 u
Bryan's age = 1 u
Total age of Adam and Bryan = 8 u
8 u = 32
1 u = 32 ÷ 8 = 4
Bryan's age now
= 1 u
= 4
(b)
Number of years that Bryan is younger than Adam
= 7 u - 1 u
= 6 u
= 6 x 4
= 24
(c)
Adam's age 12 years' ago
= 7 u - 12
= 7 x 4 - 12
= 28 - 12
= 16
Answer(s): (a) 4; (b) 24; (c) 16