top button
Flag Notify
    Connect to us
      Site Registration

Site Registration

I know one more number that is a perfect number and contains not more than 2 digits. Find the number ?

–1 vote
208 views

According to number theory of mathematics , a perfect number is a positive integer that is equal to the sum of its positive divisors excluding the number itself.
For example :
6 => 1+2+3
28 =>1+2+4+7+14

I know one more number that is a perfect number and contains not more than 2 digits (i.e 496 won't be consider as it contains 3 digits).

Find the number ?

posted Jan 31, 2018 by Pankaj Deshmukh

Share this puzzle
Facebook Share Button Twitter Share Button LinkedIn Share Button

1 Answer

0 votes

There is no two digit number that is prefect number other than 28,
I wrote a program which finds prefect number between 1 and 100
And the output was only 6 and 28
Please don't waste our time with such questions.

answer Jan 31, 2018 by Varun Bankapur



Similar Puzzles
+1 vote
Find the sum of all the prime numbers larger than 2 less than 10^12 that are 1 more than a perfect square.

Find the sum of all the prime numbers larger than 2 less than 10^12 that are 1 more than a perfect square. Because the number can get pretty big provide the answer mod 1007.

Note: Problem shouldn't take much more than one minute if your answer is taking too long consider looking for optimizations.

0 votes
What is the probability that sum of digits of this number is more than 10?

A two digit number is chosen such that it is 18 more when digits are reversed.
What is the probability that sum of digits of this number is more than 10?

0 votes
Can you find ages: Aditya is 45 years older than his son Atul. Both of their ages contains prime numbers as the digits

Aditya is 45 years older than his son Atul. If you find similarities between their ages, both of their ages contains prime numbers as the digits. Also, Aditya age is the reverse of Atul age.

Can you find their ages ?

...