Adam was 4 times as old as Bryan 35 years ago.
Their total present age is 85 years now.
- How old is Adam now?
- How many years is Adam older than Bryan?
- How old is Bryan in 5 years' time?
| |
Adam |
Bryan |
Total |
| 35 years ago |
4 u |
1 u |
5 u |
| Change |
+ 35 |
+ 35 |
+ 70 |
| Present |
4 u + 35 |
1 u + 35 |
85 |
(a)
Total age of Adam and Bryan 35 years ago
= 85 - 70
= 15
35 years ago
Adam's age = 4 u
Bryan's age = 1 u
Total age of Adam and Bryan = 5 u
5 u + 70 = 85
5 u = 85 - 70 = 15
1 u = 15 ÷ 5 = 3
Adam's age now
= 4 u + 35
= 4 x 3 + 35
= 12 + 35
= 47
(b)
Number of years that Adam is older than Bryan
= 4 u - 1 u
= 3 u
= 3 x 3
= 9
(c)
Bryan's age in 5 years' time
= 1 u + 35 + 5
= 3 + 35 + 5
= 43
Answer(s): (a) 47; (b) 9; (c) 43
