Merge pull request #10 from WritingPanda/omar

Omar's challenges

find_the_number/README.md

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+# Find the number
+
+2520 is the smallest number that can be divided by each of the numbers from 1 to 10 without any remainder.
+
+### TODO:
+Write a function that can do this:
+
+What is the smallest positive number that is evenly divisible by all of the numbers from 1 to 20?
+
+Do it in both JavaScript and PHP. Be sure to check the documentation for JavaScript and PHP functions that might be helpful to you in writing this function.
+
+###### Challenge provided by [ProjectEuler.net](http://www.projecteuler.net)

multiples_and_sums/README.md

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+# Multiples and Sums
+
+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.
+
+Bonus: Do it both PHP and JavaScript and try to run it in the browser.
+
+###### Challenge provided by [ProjectEuler.net](http://www.projecteuler.net)

sum_square_difference/README.md

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+# Sum Square Difference
+
+The sum of the squares of the first ten natural numbers is,
+
+1^2 + 2^2 + ... + 10^2 = 385
+
+The square of the sum of the first ten natural numbers is,
+
+(1 + 2 + ... + 10)^2 = 552 = 3025
+
+Hence the difference between the sum of the squares of the first ten natural numbers and the square of the sum is 3025 − 385 = 2640.
+
+Find the difference between the sum of the squares of the first one hundred natural numbers and the square of the sum.
+
+###### Challenge provided by [ProjectEuler.net](http://www.projecteuler.net)