The Problem: Moving through a triangle of number (every number chosen yields 2 more numbers to c...

The Problem: If you were to write out a number as a word, you could then count the letters and g...

The Problem: What is the sum of the digits of 2^1000? Considerations: With python we can trivi...

The Problem: How many paths can you take if you just walk through a grid by only moving down and...

The Problem: We are trying to find the longest Collatz sequence under 1000000. Considerations: ...

The Problem: There is 100 50-digit numbers that needed to be summed together. The attached file ...

The Problem: What is the value of the first triangle number to have over five hundred divisors? ...

The Problem: Find the greatest product of 4 adjacent numbers in the grid (which can be found on ...

The Problem: We are finding primes again, this time all the primes up to 2000000! We are going ...

The Problem: A pythagorean triple is such that integers a, b, c can be a^2 + b^2 = c^2. There e...