Adam is 7 times as old as Bryan now.
In 6 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 13 years ago?
|
Adam |
Bryan |
Total |
Now |
7 u |
1 u |
8 u |
Change |
+ 6 |
+ 6 |
+ 12 |
6 years later |
7 u + 6 |
1 u + 6 |
100 |
(a)
Total age of Adam and Bryan now
= 100 - 12
= 88
Now
Adam's age = 7 u
Bryan's age = 1 u
Total age of Adam and Bryan = 8 u
8 u = 88
1 u = 88 ÷ 8 = 11
Bryan's age now
= 1 u
= 11
(b)
Number of years that Bryan is younger than Adam
= 7 u - 1 u
= 6 u
= 6 x 11
= 66
(c)
Adam's age 13 years' ago
= 7 u - 13
= 7 x 11 - 13
= 77 - 13
= 64
Answer(s): (a) 11; (b) 66; (c) 64