Euler problems/31 to 40
Problem 31
Investigating combinations of English currency denominations.
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Find the sum of all numbers that can be written as pandigital products.
Solution:
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Problem 33
Discover all the fractions with an unorthodox cancelling method.
Solution:
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Problem 34
Find the sum of all numbers which are equal to the sum of the factorial of their digits.
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Problem 35
How many circular primes are there below one million?
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Problem 36
Find the sum of all numbers less than one million, which are palindromic in base 10 and base 2.
Solution:
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Problem 37
Find the sum of all eleven primes that are both truncatable from left to right and right to left.
Solution:
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Problem 38
What is the largest 1 to 9 pandigital that can be formed by multiplying a fixed number by 1, 2, 3, ... ?
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Problem 39
If p is the perimeter of a right angle triangle, {a, b, c}, which value, for p ≤ 1000, has the most solutions?
Solution:
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Problem 40
Finding the nth digit of the fractional part of the irrational number.
Solution:
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