These are set of questions which will be generally dealing with numbers
Swapping two numbers
1) Spy Number. A number is a Spy number, if sum and product of all digits are equal. Example: Number 123 is a Spy number, sum of its digits is 6 (1+2+3 =6) and product of its digits is 6(1x2x3 = 6), sum and product are same, thus, 123 is a spy number
Checking if number is even or odd
A neon number is a number where the sum of digits of square of the number is equal to the number. For example if the input number is 9, its square is 9*9 = 81 and sum of the digits is 9. i.e. 9 is a neon number. C program to check a number is a neon number or not.
Armstrong Number
An Armstrong number of three digits is an integer such that the sum of the cubes of its digits is equal to the number itself.
For example, 371 is an Armstrong number since 3**3 + 7**3 + 1**3 = 371
Given a number N, the task is to check whether the number is Automorphic number or not. A number is called Automorphic number if and only if its square ends in the same digits as the number itself.
number is called strong number if sum of the factorial of its
digit is equal to number itself. For example: 145
a series of numbers in which each number ( Fibonacci number ) is the sum of the two preceding numbers. The simplest is the series 1, 1, 2, 3, 5, 8, etc.
codenody