challenges's Introduction

Coding Challenges for Dan's Mentoring Group

Simple. Fork the repo, complete the challenge (in any language you want), prefixed with your Github username and then submit a pull request. We encourage atomic commits. One change/task per commit.

Contributors

@dansteele

@askl56

@hunj

@scripore

Maths

Fibonacci Sequence - Enter a number and have the program generate the Fibonacci sequence to that number or to the Nth number.
FizzBuzz - The age old classic. Write a program that prints the numbers from 1 to 100. But for multiples of three print “Fizz” instead of the number and for the multiples of five print “Buzz”. For numbers which are multiples of both three and five print “FizzBuzz"
Multiples of 3 and 5 - If we list all the natural numbers below 10 that are multiples of 3 or 5, we get 3, 5, 6 and 9. The sum of these multiples is 23. Find the sum of all the multiples of 3 or 5 below 1000.
Digital Root - The digital root (also repeated digital sum) of a non-negative integer is the (single digit) value obtained by an iterative process of summing digits, on each iteration using the result from the previous iteration to compute a digit sum. The process continues until a single-digit number is reached. For example, the digital root of 65,536 is 7, because 6 + 5 + 5 + 3 + 6 = 25 and 2 + 5 = 7.
Sieve of Eratosthenes - The sieve of Eratosthenes is one of the most efficient ways to find all of the smaller primes (below 10 million or so).
SquareSum Challenge - Write a method that squares all of the numbers passed into it (in an array) and sums them together.

Programs

Lumberjack Pile Problem - Help the lumberjacks stack their logs!

Ruby Exercises with RSpec

String Manipulation Category - Exercises involving string manipulation

String Reversal - The task is to reverse a string so that the method reverse_string with a parameter of "too" will return "oot". Complete this exercise without using the .reverse method.

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