#code challenges

“Arithmetic” means, from an array with at least 3 values, the difference from one value to the next one remains the same.

eg. [-1,1,3, 5] is arithmetic. [-1,1, 3, 3] is not.

First attempt under the gun of a timed challenge took an hour, almost had a working solution. Code deleted.

CODE CREW CODE CHALLENGE #3 (PRODUCT OF A POWER OF 5)

5^3 (five raised to the third power) equals 125 and the product of the digits that make up 125 equals 10 (1 x 2 x 5 = 10). Using any programming language of your choice, create a program that will quickly find the product of the digits of 5^100 (five raised to the one-hundredth power). 

BONUS:

CODE CREW CODE CHALLENGE #2 (WORD COUNT)

Using any programming language you choose, write a program that counts the number of words in a string and outputs the number of times a given word appears in the string. Your program should ignore case and non-word characters and output the number of times a given word appears such that the sentence "I really, really, really love it when my dog licks my cat." will return 3 for the for the word "really", 2 for the word "my", 1 for any other word in the sentence and 0 for any word not found in the sentence.

CODE CREW CODE CHALLENGE #1 (PALINDROMES)

Using any programming language of your choice, create a program that checks whether a given string (any word or phrase) is a palindrome, meaning that it reads the same backwards as forwards (see example in the cartoon above). 

Your program should ignore case and non-word characters (anything other than a letter in the English alphabet) such that the phrase "Mr. Owl ate my metal worm!!!!!" will be recognized as a valid palindrome.