Find happy numbers and patterns among them.

Put a different number of mice in each cage.

Devise a strategy so that you’re the one leaving the last stick on the table every time. 

You know how many legs and heads are in a crowd. Now determine how many horses are there.

Construct triangles with particular attributes.

Find numbers in the hundreds with a special relationship among the digits.

Determine numbers in different bases.

Find the sum of consecutive integers.

Using personally significant dates, you can find a surprising result.

Use the sum of consecutive integers to form certain numbers.