Fill in the blanks.
Bryan is 37 years old and
Adam is 4 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 |
37 |
4 |
33 |
Change |
+ ? |
+ ? |
|
After |
4 u |
1 u |
3 u |
(a)
Change X times into units.
Difference in their age
= 37 - 4
= 33
(b)
Difference in the age when Bryan is four times the age of Adam
= 4 u - 1 u
= 3 u
(c)
3 u = 33
1 u = 33 ÷ 3 = 11
Number of years' time when Bryan will be four times the age of Adam
= 1 u - 4
= 11 - 4
= 7
(d)
Bryan's age when he will be four times the age of Adam
= 4 u
= 4 x 11
= 44
Answer(s): (a) 33; (b) 3; (c) 7; (d) 44