Bryan is 7 times as old as Adam now.
In 13 years time, their total age is 90 years.
How old is Bryan now?
- How old is Adam now?
- How many years is Adam younger than Bryan?
- How old was Bryan 41 years ago?
|
Bryan |
Adam |
Total |
Now |
7 u |
1 u |
8 u |
Change |
+ 13 |
+ 13 |
+ 26 |
13 years later |
7 u + 13 |
1 u + 13 |
90 |
(a)
Total age of Bryan and Adam now
= 90 - 26
= 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 41 years' ago
= 7 u - 41
= 7 x 8 - 41
= 56 - 41
= 15
Answer(s): (a) 8; (b) 48; (c) 15