Bryan is 8 times as old as Adam now.
In 32 years time, their total age is 100 years.
How old is Bryan now?
- How old is Adam now?
- How many years is Adam younger than Bryan?
- How old was Bryan 7 years ago?
|
Bryan |
Adam |
Total |
Now |
8 u |
1 u |
9 u |
Change |
+ 32 |
+ 32 |
+ 64 |
32 years later |
8 u + 32 |
1 u + 32 |
100 |
(a)
Total age of Bryan and Adam now
= 100 - 64
= 36
Now
Bryan's age = 8 u
Adam's age = 1 u
Total age of Bryan and Adam = 9 u
9 u = 36
1 u = 36 ÷ 9 = 4
Adam's age now
= 1 u
= 4
(b)
Number of years that Adam is younger than Bryan
= 8 u - 1 u
= 7 u
= 7 x 4
= 28
(c)
Bryan's age 7 years' ago
= 8 u - 7
= 8 x 4 - 7
= 32 - 7
= 25
Answer(s): (a) 4; (b) 28; (c) 25