Fill in the blanks.
Adam is 33 years old and
Bryan is 3 years old.
- Difference in their age now = _____
- Difference in their age when Adam is four times the age of Bryan = _____ u
- In how many years' time will Adam be four times the age of Bryan?
- How old will Adam be when he will be four times the age of Bryan?
|
Adam |
Bryan |
Difference |
Before |
33 |
3 |
30 |
Change |
+ ? |
+ ? |
|
After |
4 u |
1 u |
3 u |
(a)
Change X times into units.
Difference in their age
= 33 - 3
= 30
(b)
Difference in the age when Adam is four times the age of Bryan
= 4 u - 1 u
= 3 u
(c)
3 u = 30
1 u = 30 ÷ 3 = 10
Number of years' time when Adam will be four times the age of Bryan
= 1 u - 3
= 10 - 3
= 7
(d)
Adam's age when he will be four times the age of Bryan
= 4 u
= 4 x 10
= 40
Answer(s): (a) 30; (b) 3; (c) 7; (d) 40