Adam is 7 times as old as Bryan now.
In 8 years time, their total age is 80 years.
How old is Adam now?
- How old is Bryan now?
- How many years is Bryan younger than Adam?
- How old was Adam 7 years ago?
|
Adam |
Bryan |
Total |
Now |
7 u |
1 u |
8 u |
Change |
+ 8 |
+ 8 |
+ 16 |
8 years later |
7 u + 8 |
1 u + 8 |
80 |
(a)
Total age of Adam and Bryan now
= 80 - 16
= 64
Now
Adam's age = 7 u
Bryan's age = 1 u
Total age of Adam and Bryan = 8 u
8 u = 64
1 u = 64 ÷ 8 = 8
Bryan's age now
= 1 u
= 8
(b)
Number of years that Bryan is younger than Adam
= 7 u - 1 u
= 6 u
= 6 x 8
= 48
(c)
Adam's age 7 years' ago
= 7 u - 7
= 7 x 8 - 7
= 56 - 7
= 49
Answer(s): (a) 8; (b) 48; (c) 49