Aptitude - Problems on Ages - Discussion
Discussion Forum : Problems on Ages - General Questions (Q.No. 13)
13.
A person's present age is two-fifth of the age of his mother. After 8 years, he will be one-half of the age of his mother. How old is the mother at present?
Answer: Option
Explanation:
Let the mother's present age be x years.
| Then, the person's present age = |  |
2 | x |  |
years. |
| 5 |
 |
|
2 | x + 8 | |
= | 1 | (x + 8) |
| 5 | 2 |
2(2x + 40) = 5(x + 8)
x = 40.
Discussion:
59 comments Page 1 of 6.
B Krishna Murthy said:
3 years ago
Thank You for explaining @Yuga.
(2)
Arjun bhaskar purekar said:
3 years ago
Suppose, the mother's age is 100 years and person's age has two-fifth of his mother then two-fifth of 100 is 40 years.
2/5 * 100 = 40.
2/5 * 100 = 40.
(16)
Nick Bayega said:
5 years ago
Let mother 's age be x.
2/5x + 8 = 1/2(x+8),
0.4x + 8 = 0.5(x+8),
X = 40.
2/5x + 8 = 1/2(x+8),
0.4x + 8 = 0.5(x+8),
X = 40.
(1)
Bhanu prasad said:
5 years ago
Present Let mother age :X.
Person's age :2/5x.
After 8 years.
Then it converted into the present.
So.
Mother age:x-8.
Person age:2/5 (x-8).
He/person will be one-half of the age of his mother.
2/5 (x-8) = 1/2 (x-8)--->(1).
By solving equation (1) you can directly get an answer.
Why because we already feature/aftet8 yers converts into the present.
So,
X=40.
Person's age :2/5x.
After 8 years.
Then it converted into the present.
So.
Mother age:x-8.
Person age:2/5 (x-8).
He/person will be one-half of the age of his mother.
2/5 (x-8) = 1/2 (x-8)--->(1).
By solving equation (1) you can directly get an answer.
Why because we already feature/aftet8 yers converts into the present.
So,
X=40.
Tshewang Chophel said:
5 years ago
They are asking the present age of the mother.
So, the answer could be 32 only.
So, the answer could be 32 only.
(7)
Sushmitha said:
6 years ago
Thanks @Yuga.
(1)
Nag Repala said:
6 years ago
If we suppose mothers age as 40 then son's age will be 16years according to 2/5th part. Then after 8years son's age will be 24years and mothers age is. 48years. This is also half of the mother. Then this is also correct only, right? Please correct me, if I am wrong.
(3)
Harshitha said:
6 years ago
The correct answer would be 32 as it is mentioned in the question the present age, so it must be 40-8=32.
(3)
Pavan said:
6 years ago
Yes, your are right @Shivani.
Karthika said:
7 years ago
Thanks @Yuga.
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