Recent content by Gotcha

Can anyone please direct me in the right way on working out the approximate area of a semi-circle with equation y = (r^2 - x^2)^0.5, by using a Riemann Sum

Here is a problem that I need to solve in preparation of my exams (I know how to use combinations, permutations, binomial coeeficcients, normal distributions): Ten fans are traveling to a rugby match in three taxis that will hold 2, 4 and 5 passengers respectively. In how many ways is it...

This was a 3rd round maths olympiad, and it wasn't multiple choice.

All of this stuff is great, thanks guys! This still doesn't solve the problem without the use of a calculator ... except if you can calculate the sines of numbers in your head!

The following is a problem I got in a Maths Olympiad, I had to solve it without a calculator, although I couldn't solve it: sin 1 + sin 2 + sin 3 + ... + sin 90 If anyone could show me how to solve this I would really appreciate it.

Hi There Everyone! I was wondering if any of you could guide me in the right direction concerning the following problem (an algorithm would be much appreciated): I am writing a program for a Computer Science Project. The Program works as follows: 1. It generates a random number with a...

I need help with the actual solving of the problem. Thats what I asked for - a mathematical way through which I can solve this program

I coded the program in Delphi, as I was very lazy, but I can also program in Java as well as C++ if I need to convert it. What matt grime posted is very true, an arbitrary set of guesses won't neccessarily be able to solve the code. The algorithm should still however work out which digits...

It only says that a digit is right if it is in the right position. But you are all missing the point. My program should solve the sequence, by using mathematical logic, when the user types in a number of sets and how many numbers are in the right positions.

Yes, I do mean x digits, 4 for example.

Hi There Everyone! I was wondering if any of you could guide me in the right direction concerning the following problem (an algorithm would be much appreciated): I am writing a program for a Computer Science Project. The Program works as follows: 1. It generates a random number with x...