Alan Richmond

Numbers

Ramanujan’s 129th Birthday

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Someone on Reddit pointed out that today (Dec 22nd) is Ramanujan’s 129th birthday. One of the commenters further pointed out that 129 is the sum of the first 10 primes, and the smallest number that is the sum of three squares …

Have we already seen this number? (deja vu again)

I had a phone interview for a Python job the other day. It started out really well, he was very impressed with my CV and called me a ‘rocket scientist’. But then we got down to the technical questions and …

Number guessing game

The number guessing game incorporates several simple but important elements of elementary programming and is a good candidate for an introductory programming example.

If you’ve seen any programming course, you’ve probably seen the “Hello World” program. In Python it’s: …

Compute Average Heights

This is a simple program to compute average heights. In a loop, it prompts the user for heights, inputs a text string and converts it to a ‘real’ number, sums them, and divides by the number of heights. Exit is …

Binary Search

Binary Search is one of the most fundamental computer algorithms. Given an ordered list of some data (names, numbers, …) find out if it contains a particular item. For example, consider the list: 2, 4, 5, 7, 8, 11, 12. …

FizzBuzz

This is apparently a well-known interview question (but not one I was ever asked). Print the numbers 1 to 100, but replace every number divisible by 3 with “Fizz”, every number divisible by 5 with “Buzz”, and every number that’s …