Project Euler problems PDF

A place where I practice coding, do coding competitions, do homework, and help my friends to code.

Find the number of ways to make n pence using any number of coins

Find the number of triangle words in the provided array. A PDF File is available for viewing the words. A triangle word is whose word value is a triangle number. A word value is the sum of numbers corresponding to its alphabetical position. For example, SKY has a word value of 55, because 19 + 11 + 25 = 55. SKY is a triangle word, because 55 is …

Counts the number of Lychrel Numbers below the limit (e.g. 10000)

Solving Project Euler problems

Pentagonal Numbers are generated by the formula Pn = n(3n-1)/2. The first ten pentagonal numbers are 1, 5, 12, 22, 35, 51, 70, 92, 117, 145. The aim is to find the pair of pentagonal numbers, Pj and Pk , for which their sum and difference is pentagonal and D = |Pk - Pj| is minimised. Find the value of D.

Find the number of fractions lying between 1/3 and 1/2 in the sorted set of reduced proper fractions for d ≤ limit.

Find the number of continued fractions for N less than or equal to n have an odd period.

➰ Project Euler

Considering natural numbers in the form of a to the power of b, where a and b are less than n, the aim is to find the maximum digital sum.

Find the smallest cube for which exactly n permutations of its digits are cube as described in https://projecteuler.net/problem=62

Project Euler solutions in Javascript

All Project Euler problems, and my solutions to some of them

Find the sum of all numbers which are equal to the sum of the factorial of their digits. Note: As 1! = 1 and 2! = 2 are not sums, they are not included.

Find the sum of all products whose multiplicand/multiplier/product identity can be written as a 1 through n pandigital, where n is the number of digits.

Find the number of chains, with a starting number below n, that contain exactly sixty non-repeating terms.

My solution for https://projecteuler.net

Find the value of n, for which 1 < n < limit, for which φ(n) is a permutation of n and n/φ(n) produces a minimum.

Find the number of positive integers of length n and an nth power