Number Programming C Language

1. Write a program to check whether a number is prime or not?
2.  Write a program to input two number and check whether its is twin prime number or not?
   

   Explanation :

   A number said to be twin prime if given number gap is 2 and it is prime number
   
                                              
3.  Write A program to input two number and check whether its is Twisted Twin Prime Number or not?
   Explanation : Two Number said to be twisted twin prime number if gap between given number is 2 and Prime, Reverse prime
   Ex :  11-13
   
   
4. Write a program to calculate Armstrong number?
   A number said to Armstrong if sum each with is same as given number
   153 =1*1*1+5*5*5*+3*3*3=153
5. Write a program to check whether a number is palindrome?

   A number said to palindrome if reverse of each digit is same as input number

   e.g.  17371=17371
6. Write a program to check whether a number is Magic number or not ?
7. Write a program to check perfect number?
8. Write a program to check Strong number?
9. Write a C Program using function to print equivalent binary number of decimal number input by keyboard?
10. Write a C Program to print and count all numbers between 1 to 100 divisible by 11.
11. Write a program to  print  all prime numbers from  1  to  100. Use nested loops, break or continue statement wherever necessary.
12. Write a program to find the sum of the digits of a number.

    13. Write a program to print all the Krishnamurti number from 1 to n. Here, n is user dependent. A             Krishnamurti number is a number whose sum of factorial of individual digits equals the number.         For example, 145 = 1! + 4! + 5! = 1 + 24+ 120 = 145.

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