Fill in the blanks.
Bryan is 39 years old and
Adam is 3 years old.
- Difference in their age now = _____
- Difference in their age when Bryan is four times the age of Adam = _____ u
- In how many years' time will Bryan be four times the age of Adam?
- How old will Bryan be when he will be four times the age of Adam?
|
Bryan |
Adam |
Difference |
Before |
39 |
3 |
36 |
Change |
+ ? |
+ ? |
|
After |
4 u |
1 u |
3 u |
(a)
Change X times into units.
Difference in their age
= 39 - 3
= 36
(b)
Difference in the age when Bryan is four times the age of Adam
= 4 u - 1 u
= 3 u
(c)
3 u = 36
1 u = 36 ÷ 3 = 12
Number of years' time when Bryan will be four times the age of Adam
= 1 u - 3
= 12 - 3
= 9
(d)
Bryan's age when he will be four times the age of Adam
= 4 u
= 4 x 12
= 48
Answer(s): (a) 36; (b) 3; (c) 9; (d) 48