1) Temperature Conversion
  2) Marks - Total, Aggregate, Grade
  3) Leap year
  4) Check Palindrome
  5) Number of digits
  6) Check Square Number
  7) Factorial
  8) Check Prime
  9) Check Armstrong
 10) First n Fibonacci Series (Iteration)
 11) First n Fibonacci Series (Recursion)
 12) Check Perfect Number
 13) Check Special Number
 14) e^x Series [x^i / i!]
 15) GCD of Two Numbers
 16) GCD of Multi Numbers
 17) LCM of Two Numbers
 18) LCM of Multi Numbers