5problems
5 Problems any developer 'should' be able to do in under 1 hour
The 5 problems
(The following problems are ridiculously simple, but you'd be surprise to discover how many people struggle with them. To the point of not getting anything done at all. Seriously.)
###Problem 1 playing with git. This is the first commit
Write three functions that compute the sum of the numbers in a given list using a for-loop, a while-loop, and recursion.
##Problem 2
Write a function that combines two lists by alternatingly taking elements. For example: given the two lists [a, b, c] and [1, 2, 3], the function should return [a, 1, b, 2, c, 3].
##Problem 3
Write a function that computes the list of the first 100 Fibonacci numbers. By definition, the first two numbers in the Fibonacci sequence are 0 and 1, and each subsequent number is the sum of the previous two. As an example, here are the first 10 Fibonnaci numbers: 0, 1, 1, 2, 3, 5, 8, 13, 21, and 34.
##Problem 4
Write a function that given a list of non negative integers, arranges them such that they form the largest possible number. For example, given [50, 2, 1, 9], the largest formed number is 95021.
Update: Apparently this problem got a lot of people talking (although not as much as Problem 5 below.) You can click here to read my solution.
##Problem 5
Write a program that outputs all possibilities to put + or - or nothing between the numbers 1, 2, ..., 9 (in this order) such that the result is always 100. For example: 1 + 2 + 34 – 5 + 67 – 8 + 9 = 100. hi there