Bryan is 7 times as old as Adam now.
In 32 years time, their total age is 80 years.
How old is Bryan now?
- How old is Adam now?
- How many years is Adam younger than Bryan?
- How old was Bryan 4 years ago?
|
Bryan |
Adam |
Total |
Now |
7 u |
1 u |
8 u |
Change |
+ 32 |
+ 32 |
+ 64 |
32 years later |
7 u + 32 |
1 u + 32 |
80 |
(a)
Total age of Bryan and Adam now
= 80 - 64
= 16
Now
Bryan's age = 7 u
Adam's age = 1 u
Total age of Bryan and Adam = 8 u
8 u = 16
1 u = 16 ÷ 8 = 2
Adam's age now
= 1 u
= 2
(b)
Number of years that Adam is younger than Bryan
= 7 u - 1 u
= 6 u
= 6 x 2
= 12
(c)
Bryan's age 4 years' ago
= 7 u - 4
= 7 x 2 - 4
= 14 - 4
= 10
Answer(s): (a) 2; (b) 12; (c) 10