1. Write a function that adds up the whole numbers from 1 to n. For example the sum form 1 to 10 is 55. The formula , developed by Carl F. Gauss, is SumN(n)= n(n+1)/2
3. You may recall that if you have two points on a plane (x1,y1) and (x2,y2) you can calculate the distance between them using the formula d=sqrt((x2-x1)**2 +(y2-y1)**2)
4. Remember the quadratic formula for solving 0=ax2+bx+c. Look it up. Remember there are two answers and they may be real or imaginary.
5. Calculate the combination of N things taken r at a time. Cn,r = n!/(r!(n-r)!)
6. The area of a triangle can be calculated by Herons formula. Here is a discussion.
7. Write two functions called even(n) and odd(n). These use the modulo operator % to return either true or false. IE even(n) should return true if n is even otherwise return false. Note a simple comparison such as x>4 or z==3 are either true or false. The % operator returns the remainder after dividing. For example x % 2 will return either a 0 or a 1.
8. Write a function called PerfectSquare(n) that will return true or false depending on whether or not n is a perfect square. Examples ae 1,,4,9,16,25 and so on. This one is a little tricky.
9. Write a formula that will calculate and return compound interest. Here is a discussion.