Personal tools

Euler problems/71 to 80

From HaskellWiki

Jump to: navigation, search


1 Problem 71

Listing reduced proper fractions in ascending order of size.


problem_71 = undefined

2 Problem 72

How many elements would be contained in the set of reduced proper fractions for d ≤ 1,000,000?


problem_72 = undefined

3 Problem 73

How many fractions lie between 1/3 and 1/2 in a sorted set of reduced proper fractions?


problem_73 = undefined

4 Problem 74

Determine the number of factorial chains that contain exactly sixty non-repeating terms.


problem_74 = undefined

5 Problem 75

Find the number of different lengths of wire can that can form a right angle triangle in only one way.


problem_75 = undefined

6 Problem 76

How many different ways can one hundred be written as a sum of at least two positive integers?


problem_76 = undefined

7 Problem 77

What is the first value which can be written as the sum of primes in over five thousand different ways?


problem_77 = undefined

8 Problem 78

Investigating the number of ways in which coins can be separated into piles.


problem_78 = undefined

9 Problem 79

By analysing a user's login attempts, can you determine the secret numeric passcode?


problem_79 = undefined

10 Problem 80

Calculating the digital sum of the decimal digits of irrational square roots.


problem_80 = undefined