Adam is 7 times as old as Bryan now.
In 7 years time, their total age is 70 years.
How old is Adam now?
- How old is Bryan now?
- How many years is Bryan younger than Adam?
- How old was Adam 3 years ago?
|
Adam |
Bryan |
Total |
Now |
7 u |
1 u |
8 u |
Change |
+ 7 |
+ 7 |
+ 14 |
7 years later |
7 u + 7 |
1 u + 7 |
70 |
(a)
Total age of Adam and Bryan now
= 70 - 14
= 56
Now
Adam's age = 7 u
Bryan's age = 1 u
Total age of Adam and Bryan = 8 u
8 u = 56
1 u = 56 ÷ 8 = 7
Bryan's age now
= 1 u
= 7
(b)
Number of years that Bryan is younger than Adam
= 7 u - 1 u
= 6 u
= 6 x 7
= 42
(c)
Adam's age 3 years' ago
= 7 u - 3
= 7 x 7 - 3
= 49 - 3
= 46
Answer(s): (a) 7; (b) 42; (c) 46