Difference between revisions of "Euler problems/41 to 50"
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Revision as of 08:21, 27 March 2007
Contents
Problem 41
What is the largest ndigit pandigital prime that exists?
Solution:
problem_41 = undefined
Problem 42
How many triangle words can you make using the list of common English words?
Solution:
problem_42 = undefined
Problem 43
Find the sum of all pandigital numbers with an unusual substring divisibility property.
Solution:
problem_43 = undefined
Problem 44
Find the smallest pair of pentagonal numbers whose sum and difference is pentagonal.
Solution:
problem_44 = undefined
Problem 45
After 40755, what is the next triangle number that is also pentagonal and hexagonal?
Solution:
problem_45 = undefined
Problem 46
What is the smallest odd composite that cannot be written as the sum of a prime and twice a square?
Solution:
problem_46 = undefined
Problem 47
Find the first four consecutive integers to have four distinct primes factors.
Solution:
problem_47 = undefined
Problem 48
Find the last ten digits of 11 + 22 + ... + 10001000.
Solution:
problem_48 = undefined
Problem 49
Find arithmetic sequences, made of prime terms, whose four digits are permutations of each other.
Solution:
problem_49 = undefined
Problem 50
Which prime, below onemillion, can be written as the sum of the most consecutive primes?
Solution:
problem_50 = undefined