Basic C# Programs

51 Factorial of 9 Medium 52 Check if 13 is prime Medium 53 First 11 Fibonacci numbers Medium 54 Count evens from 1 to 12 Easy 55 GCD of 13 and 20 Medium 56 Print numbers 1 to 14 Easy 57 Sum of first 15 natural numbers Easy 58 Factorial of 16 Medium 59 Check if 5 is prime Medium 60 First 10 Fibonacci numbers Medium 61 Count evens from 1 to 19 Easy 62 GCD of 20 and 27 Medium 63 Print numbers 1 to 21 Easy 64 Sum of first 22 natural numbers Easy 65 Factorial of 23 Medium 66 Check if 29 is prime Medium 67 Count evens from 1 to 6 Easy 68 GCD of 7 and 14 Medium