Fill in the blanks.
Bryan is 80 years old and
Adam is 22 years old.
- Difference in their age now = _____
- Difference in their age when Bryan was thrice the age of Adam = _____ u
- In how many years' before was Bryan thrice the age of Adam?
- How old was Bryan when he was thrice the age of Adam?
|
Bryan |
Adam |
Difference |
Before |
3 u |
1 u |
2 u |
Change |
+ ? |
+ ? |
|
After |
80 |
22 |
58 |
(a)
Change X times into units.
Difference in their age now
= 80 - 22
= 58
(b)
Difference in the age when Bryan is thrice the age of Adam
= 3 u - 1 u
= 2 u
(c)
2 u = 58
1 u = 58 ÷ 2 = 29
Number of years before when Bryan was thrice the age of Adam
= 22 - 1 u
= 22 - 29
= -7
(d)
Bryan's age before when he was thrice the age of Adam
= 3 u
= 3 x 29
= 87
Answer(s): (a) 58; (b) 2; (c) -7; (d) 87