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Solutions 10 – 50

This category contains 41 posts

Project Euler 20 Solution

Find the sum of the digits in 100!

Project Euler 21 Solution

Evaluate the sum of all amicable pairs under 10,000.

Project Euler 22 Solution

Calculate the total of all the name scores in the file of first names.

Project Euler 23 Solution

Find the sum of all the positive integers which cannot be written as the sum of two abundant numbers.

Project Euler 24 Solution

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

Project Euler 25 Solution

Find the first term in the Fibonacci sequence to contain 1000 digits.

Project Euler 26 Solution

Find the value of d < 1000 for which 1/d contains the longest recurring cycle.

Project Euler 27 Solution

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

Project Euler 28 Solution

Find the sum of both diagonals in a square spiral.

Project Euler 29 Solution

Find the distinct terms in the sequence generated by a**b for 2 ≤ a ≤ 100 and 2 ≤ b ≤ 100?