Bryan is 7 times as old as Adam now.
In 18 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 38 years ago?
|
Bryan |
Adam |
Total |
Now |
7 u |
1 u |
8 u |
Change |
+ 18 |
+ 18 |
+ 36 |
18 years later |
7 u + 18 |
1 u + 18 |
100 |
(a)
Total age of Bryan and Adam now
= 100 - 36
= 64
Now
Bryan's age = 7 u
Adam's age = 1 u
Total age of Bryan and Adam = 8 u
8 u = 64
1 u = 64 ÷ 8 = 8
Adam's age now
= 1 u
= 8
(b)
Number of years that Adam is younger than Bryan
= 7 u - 1 u
= 6 u
= 6 x 8
= 48
(c)
Bryan's age 38 years' ago
= 7 u - 38
= 7 x 8 - 38
= 56 - 38
= 18
Answer(s): (a) 8; (b) 48; (c) 18