Fill in the blanks.
Bryan is 76 years old and
Adam is 60 years old.
- Difference in their age now = _____
- Difference in their age when Bryan was five times the age of Adam = _____ u
- In how many years' before was Bryan five times the age of Adam?
- How old was Bryan when he was five times the age of Adam?
|
Bryan |
Adam |
Difference |
Before |
5 u |
1 u |
4 u |
Change |
+ ? |
+ ? |
|
After |
76 |
60 |
16 |
(a)
Change X times into units.
Difference in their age now
= 76 - 60
= 16
(b)
Difference in the age when Bryan is five times the age of Adam
= 5 u - 1 u
= 4 u
(c)
4 u = 16
1 u = 16 ÷ 4 = 4
Number of years before when Bryan was five times the age of Adam
= 60 - 1 u
= 60 - 4
= 56
(d)
Bryan's age before when he was five times the age of Adam
= 5 u
= 5 x 4
= 20
Answer(s): (a) 16; (b) 4; (c) 56; (d) 20