### Euler Problem 33: Digit Cancelling Fractions and Ford Circles

Euler Problem 33 takes us back to the world of fractions from our primary school days. This article explains how to solve Euler Problem 33 with R and shows how to use a seqence of fractions to draw Fo... Read More

### Laser Beams and Elliptical Billiards: Euler Problem 144

This article provides a solution in the R language for Euler Problem 144: How many times does a laser bounce inside an elliptical mirror before the light beam exits it? We can use the solution to this... Read More

### Pandigital Products: Euler Problem 32

Euler Problem 32 returns to pandigital numbers, which are numbers that contain one of each digit. Like so many of the Euler Problems, these numbers serve no practical purpose whatsoever, other than so... Read More

### Digit fifth powers: Euler Problem 30

A solution in R for Euler Problem 30: Digit fifth powers. Find the sum of all the numbers that can be written as the sum of fifth powers of their digits. Numberphile has a nice video about a trick to ... Read More

### Euler Problem 29: Distinct Powers

Proposed solution to Euler Problem 29: Distinct Powers in the R language for statistical computing.... Read More

### Euler Problem 28: The Ulam Spiral and Quadratic primes

Proposed solution to Euler Problem 28 in the R language for statistical computing. What is the sum of the numbers on the diagonals in a 1001 by 1001 spiral?... Read More

### Generating Quadratic Primes: Euler Problem 27

Solution to Euler Problem 27 using the R language. Find the product of the coefficients for the quadratic expression that produces the most primes.... Read More

### The Viral Recurring Decimal: Euler Problem 26

Proposed solution to Euler Problem 26 in the R language. Find the value of d < 1000 for which 1/d contains the longest recurring decimal cycle.... Read More

### Fibonacci number with 1000 digits, Euler Problem 25

Solution to Euler Problem 25 in the R language. What is the index of the first term in the Fibonacci sequence to contain 1000 digits?... Read More

### Lexicographic Permutations: Proposed Solution to Euler Problem 24

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

### Euler Problem 23: Finding Non-Abundant Sums

A solution in the R language to Euler Problem 23. Find the sum of all the positive integers which cannot be written as the sum of two abundant numbers.... Read More

### Euler Problem 22 : Names Scores

A proposed solution in the R language to Euler Problem 22. What is the total of all the name scores in the file of 5163 first names?... Read More