Adam was 4 times as old as Bryan 35 years ago.
Their total present age is 95 years now.
- How old is Adam now?
- How many years is Adam older than Bryan?
- How old is Bryan in 10 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 |
95 |
(a)
Total age of Adam and Bryan 35 years ago
= 95 - 70
= 25
35 years ago
Adam's age = 4 u
Bryan's age = 1 u
Total age of Adam and Bryan = 5 u
5 u + 70 = 95
5 u = 95 - 70 = 25
1 u = 25 ÷ 5 = 5
Adam's age now
= 4 u + 35
= 4 x 5 + 35
= 20 + 35
= 55
(b)
Number of years that Adam is older than Bryan
= 4 u - 1 u
= 3 u
= 3 x 5
= 15
(c)
Bryan's age in 10 years' time
= 1 u + 35 + 10
= 5 + 35 + 10
= 50
Answer(s): (a) 55; (b) 15; (c) 50