Fill in the blanks.
Adam is 71 years old and
Bryan is 35 years old.
- Difference in their age now = _____
- Difference in their age when Adam was five times the age of Bryan = _____ u
- In how many years' before was Adam five times the age of Bryan?
- How old was Adam when he was five times the age of Bryan?
|
Adam |
Bryan |
Difference |
Before |
5 u |
1 u |
4 u |
Change |
+ ? |
+ ? |
|
After |
71 |
35 |
36 |
(a)
Change X times into units.
Difference in their age now
= 71 - 35
= 36
(b)
Difference in the age when Adam is five times the age of Bryan
= 5 u - 1 u
= 4 u
(c)
4 u = 36
1 u = 36 ÷ 4 = 9
Number of years before when Adam was five times the age of Bryan
= 35 - 1 u
= 35 - 9
= 26
(d)
Adam's age before when he was five times the age of Bryan
= 5 u
= 5 x 9
= 45
Answer(s): (a) 36; (b) 4; (c) 26; (d) 45