Problem 24: What is the millionth lexicographic permutation of the digits 0, 1, 2, 3, 4, 5, 6, 7, 8 and 9?

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Problem 24: What is the millionth lexicographic permutation of the digits 0, 1, 2, 3, 4, 5, 6, 7, 8 and 9?
Problem 23: Find the sum of all the positive integers which cannot be written as the sum of two abundant numbers.
Problem 22: Using names.txt, a 46K text file containing over fivethousand first names, begin by sorting it into alphabetical order. Then working out the alphabetical value for each name, multiply this value by its alphabetical position in the list to obtain a name score.
What is the total of all the name scores in the file?
Problem 21: Evaluate the sum of all amicable pairs under 10000.
Problem 20: Find the sum of the digits in the number 100!
Problem 19: How many Sundays fell on the first of the month during the twentieth century?
Problem 67: Find the maximum total from top to bottom in triangle.txt, a 15K text file containing a triangle with onehundred rows.
Problem 18: Find the maximum sum travelling from the top of the triangle to the base.
Problem 17:
If the numbers 1 to 5 are written out in words: one, two, three, four, five, then there are 3 + 3 + 5 + 4 + 4 = 19 letters used in total.
If all the numbers from 1 to 1000 (one thousand) inclusive were written out in words, how many letters would be used?
Problem 16: What is the sum of the digits of the number 2^1000?