I'm Simon Haynes, programmer and author. Welcome to my website.

I'm a frequent Twitter user, and I have a Facebook author page. Feel free to drop by and say hello.

I'm lucky enough to have been published in five countries (soon to be six), and you'll find my work on all the major book-selling sites.

Guess-the-balls test

Hal Spacejock delivers a shipment of antiques, breaking several pieces in the process. His robot, Clunk, skillfully reassembles the broken furniture, and the grateful customer gives them a jar of ancient marbles.
This jar is 60cm (2 feet) high, with a diameter of 36cm (approx 14 inches). It is completely filled with marbles, each of which is 2.5cm (1 inch) in diameter.

Using that information... how many balls does Clunk have?

Enter a number:
If you have no idea... guess!

The jar Clunk was given