You may also like

problem icon

Special Numbers

My two digit number is special because adding the sum of its digits to the product of its digits gives me my original number. What could my number be?

problem icon

Your Number Is...

Think of a number... follow the machine's instructions. I know what your number is! Can you explain how I know?

problem icon

First Forward Into Logo 6: Variables and Procedures

Learn to write procedures and build them into Logo programs. Learn to use variables.

Your Number Was...

Stage: 3 Challenge Level: Challenge Level:1

This problem follows on from Your Number Is...

Press START to investigate what this machine does:

If you can see this message Flash may not be working in your browser
Please see to enable it.

Try starting with other numbers - maybe decimals or negative numbers.

How is the machine working out your starting numbers?

Can you devise your own set of instructions so you can work out someone else's starting numbers in the same way?