Adam is 7 times as old as Bryan now.
In 10 years time, their total age is 100 years.
How old is Adam now?
- How old is Bryan now?
- How many years is Bryan younger than Adam?
- How old was Adam 14 years ago?
|
Adam |
Bryan |
Total |
Now |
7 u |
1 u |
8 u |
Change |
+ 10 |
+ 10 |
+ 20 |
10 years later |
7 u + 10 |
1 u + 10 |
100 |
(a)
Total age of Adam and Bryan now
= 100 - 20
= 80
Now
Adam's age = 7 u
Bryan's age = 1 u
Total age of Adam and Bryan = 8 u
8 u = 80
1 u = 80 ÷ 8 = 10
Bryan's age now
= 1 u
= 10
(b)
Number of years that Bryan is younger than Adam
= 7 u - 1 u
= 6 u
= 6 x 10
= 60
(c)
Adam's age 14 years' ago
= 7 u - 14
= 7 x 10 - 14
= 70 - 14
= 56
Answer(s): (a) 10; (b) 60; (c) 56