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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Home > Archives for July, 2012
Monthly Archives: July 2012
Project Euler – Problem 23
Monday, July 30th, 2012
Problem 23: Find the sum of all the positive integers which cannot be written as the sum of two abundant numbers.
Project Euler – Problem 22
Monday, July 30th, 2012
Problem 22: Using names.txt, a 46K text file containing over five-thousand 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?
Project Euler – Problem 21
Monday, July 30th, 2012
Problem 21: Evaluate the sum of all amicable pairs under 10000.
Project Euler – Problem 20
Monday, July 30th, 2012
Problem 20: Find the sum of the digits in the number 100!
Project Euler – Problem 19
Monday, July 30th, 2012
Problem 19: How many Sundays fell on the first of the month during the twentieth century?
Project Euler – Problem 67
Monday, July 30th, 2012
Problem 67: Find the maximum total from top to bottom in triangle.txt, a 15K text file containing a triangle with one-hundred rows.
Project Euler – Problem 18
Monday, July 30th, 2012
Problem 18: Find the maximum sum travelling from the top of the triangle to the base.
Project Euler – Problem 17
Monday, July 30th, 2012
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?
Project Euler – Problem 16
Sunday, July 29th, 2012
Problem 16: What is the sum of the digits of the number 2^1000?
Project Euler – Problem 23
Monday, July 30th, 2012
Problem 23: Find the sum of all the positive integers which cannot be written as the sum of two abundant numbers.
Project Euler – Problem 22
Monday, July 30th, 2012
Problem 22: Using names.txt, a 46K text file containing over five-thousand 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?
Project Euler – Problem 21
Monday, July 30th, 2012
Problem 21: Evaluate the sum of all amicable pairs under 10000.
Project Euler – Problem 20
Monday, July 30th, 2012
Problem 20: Find the sum of the digits in the number 100!
Project Euler – Problem 19
Monday, July 30th, 2012
Problem 19: How many Sundays fell on the first of the month during the twentieth century?
Project Euler – Problem 67
Monday, July 30th, 2012
Problem 67: Find the maximum total from top to bottom in triangle.txt, a 15K text file containing a triangle with one-hundred rows.
Project Euler – Problem 18
Monday, July 30th, 2012
Problem 18: Find the maximum sum travelling from the top of the triangle to the base.
Project Euler – Problem 17
Monday, July 30th, 2012
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?
Project Euler – Problem 16
Sunday, July 29th, 2012
Problem 16: What is the sum of the digits of the number 2^1000?