This is a very trivial thing to write about – almost all of you know how to find the difference in between two dates and hence you may consi...
This is a very trivial thing to write about – almost all of you know how to find the difference in between two dates and hence you may consider this blog post not worth reading. However, there are still a few among you who may have confusions and it is for these small section of confused persons that this blog article is being written about. Believe me, I got a handful of mails asking me to post this.
The problem:
Say the news paper ad or the website notification on recruitment/entrance exam says this about the eligibility on age:
Your age should be minimum 17 years & maximum 21 years as on 01.01.2012.
Now suppose your Date Of Birth (DOB) is dd.mm.yyyy.
Question on your mind is: “Are you eligible?”
The easy solution:
To find the DOB of minimum age:
Just subtract minimum age from the reference year – i.e. say for the example above, subtract 17 from 2012 to arrive at DOB of minimum age as shown at right. So this DOB is 01.01.1995.
To find the DOB of maximum age:
Subtract the maximum age from the reference year. Also add “1” to the date of reference – i.e. say for the example above, subtract 21 from year 2012 and add 1 to the date 01 as shown at right. And this DOB is 02.01.1991.
Now if you are within the above dates (and including them), you are eligible. i.e. you are eligible if your DOB is 01.01.1995 but not eligible if the DOB is 02.01.1995.
Similarly you are eligible if your DOB is 02.01.1991 but not eligible if the DOB is 01.01.1991. This maximum age is sometime confusing – because say, if your DOB is 01.01.1991, your age actually is 21 on 01.01.2012 and hence you should be eligible. So just contact the person concerned and clarify if your DOB is such like that.
How to find your age on a certain date:
Say if your DOB is 02.01.1995, you are not eligible in above example. Why? What is your age on 01.01.2012?
To find your age at first you should know how many days each month of the year comprises of. If you do not know that, take help of the graphics on your knuckle (presented by BC Akhilesh) at right – each month at the hump is 31 days – Jan, Mar, May, Jul, Aug, Oct, Dec. Remaining, except Feb are 30 days.
February in leap year is 29 days, otherwise it is 28 days. How do you find a leap year? Take the year and divide it by 4 – if it is divisible, it is a leap year. But for centenary years (i.e. last 2 digits “00” – say 2000, 2100 etc.), you have to divide it by 400, instead of 4.
So with above information and your DOB 02.01.1995, let us find your age on 01.01.2012.
Step-1: Find days
First deduct the dates – now since you can not deduct 2 from 1 as shown below, borrow days from the month – since the month is January, add 31 to 1 – which makes it 32 days. Now deduct 2 from 32 – which gives you 30 days.
Step-2: Find months
Than deduct the months – now you are left with “00” months as shown below. So borrow 12 months (i.e. 1 year) from the year – add 12 to “00” – which makes it 12 months. Now deduct 1 from 12 – which gives you 11 months.
Step-3: Find years
Than deduct the year – now you are left with year “2011” as shown below. So deduct 1995 from 2011 – which gives you 16 years.
So your age is: 16 years, 11 months & 30 days on 01.01.2012. That’s why you are not eligible, since minimum age is 17 years.
Hope with above illustrations you can easily find whether you are age-wise eligible for any exam - be it in an entrance or a recruitment or a scholarship exam. That was easy, wasn't it?
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