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Solutions 40-49

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Project Euler Problem 49 Solution

By Mike ⋅ June 5, 2009 ⋅ Post a comment

Find arithmetic sequences, made of prime terms, whose four digits are permutations of each other.

Project Euler Problem 47 Solution

By Mike ⋅ June 5, 2009 ⋅ Post a comment

Find the first four consecutive integers to have four distinct primes factors.

Project Euler Problem 46 Solution

By Mike ⋅ May 28, 2009 ⋅ Post a comment

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

Project Euler Problem 40 Solution

By Mike ⋅ May 25, 2009 ⋅ Post a comment

Finding the nth digit of the fractional part of the irrational number.

Project Euler Problem 43 Solution

By Mike ⋅ April 28, 2009 ⋅ 2 comments

Find the sum of all pandigital numbers with an unusual sub-string divisibility property.

Project Euler Problem 42 Solution

By Mike ⋅ April 27, 2009 ⋅ Post a comment

How many triangle words does the list of common English words contain?

Project Euler Problem 44 Solution

By Mike ⋅ April 17, 2009 ⋅ One comment

Find the smallest pair of pentagonal numbers whose sum and difference is pentagonal.

Project Euler Problem 45 Solution

By Mike ⋅ April 10, 2009 ⋅ 2 comments

After 40755, what is the next triangle number that is also pentagonal and hexagonal?

Project Euler Problem 41 Solution

By Mike ⋅ March 26, 2009 ⋅ Post a comment

What is the largest n-digit pandigital prime that exists?

Project Euler Problem 48 Solution

By Mike ⋅ March 24, 2009 ⋅ 2 comments

Find the last ten digits of 11 + 22 + … + 10001000.

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