Fill in the blanks.
Adam is 40 years old and
Bryan is 36 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 |
40 |
36 |
4 |
(a)
Change X times into units.
Difference in their age now
= 40 - 36
= 4
(b)
Difference in the age when Adam is five times the age of Bryan
= 5 u - 1 u
= 4 u
(c)
4 u = 4
1 u = 4 ÷ 4 = 1
Number of years before when Adam was five times the age of Bryan
= 36 - 1 u
= 36 - 1
= 35
(d)
Adam's age before when he was five times the age of Bryan
= 5 u
= 5 x 1
= 5
Answer(s): (a) 4; (b) 4; (c) 35; (d) 5