Armstrong Number

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                   A number is armstrong if the sum of cubes of individual digits of a number is equal to the number itself. For example ...

perfect number

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      A perfect number is a number such that the sum of its factors including 1 and excluding itself is equal to the number Example: ...

Adam Number

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           If the square of a number and the reverse of square of the same number are palindrome to each other, then the number is Adam nu...

Palindrome

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            A polindrome  is a word or a number or a sequence of units that is able to be read the same way from either direction, be it f...

Prime Number

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Prime Number :      Prime Number is a positive number ( >0 ) that is divisible only by 1 and itself. Example 1:        We will cons...

Sum of digit

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                     The digit sum of a number, say 152, is just the sum of the digits, 1+5+2=8. If the sum of the digits is greater than ...
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