These secondary problems have not yet been solved. Can you be the first?

Quadratic graphs are very familiar, but what patterns can you explore with cubics?

I'm thinking of a number. My number is both a multiple of 5 and a multiple of 6. What could my number be?

Think of a two digit number, reverse the digits, and add the numbers together. Something special happens...

When I park my car in Mathstown, there are two car parks to choose from. Can you help me to decide which one to use?

Which is bigger, n+10 or 2n+3? Can you find a good method of answering similar questions?

Join pentagons together edge to edge. Will they form a ring?

Can you find examples of magic crosses? Can you find all the possibilities?