// archives

## Archive for May, 2009

### Project Euler 99

Which base/exponent pair in the file has the greatest numerical value?

### Project Euler 59

Using a brute force attack, can you decrypt the cipher using XOR encryption?

### Project Euler 46

What is the smallest odd composite that cannot be written as the sum of a prime and twice a square?

### Project Euler 135

Determining the number of solutions of the equation x2 − y2 − z2 = n.

### Project Euler 100 Solution

Finding the number of blue discs for which there is 50% chance of taking two blue.

### Project Euler 51

Find the smallest prime which, by changing the same part of the number, can form eight different primes.

### Project Euler 40 Solution

Compose Champernowne’s constant

### Project Euler 121

Investigate the game of chance involving coloured discs.

### Project Euler 24

What is the millionth lexicographic permutation of the digits 0, 1, 2, 3, 4, 5, 6, 7, 8 and 9?

### Project Euler 27

Find a quadratic formula that produces the maximum number of primes for consecutive values of n.