Common multiples

Maths

Which of these numbers is a common multiple of 2 and 3?

What is the lowest common multiple of 4 and 5?

Which of these numbers is both a multiple of 4 and a factor of 100?

Which of these numbers is a multiple of a square number that is not 1?

What is the lowest common multiple of 2, 3, and 5?

Because the smallest sized polygon has 3 sides

Why can't factors of 1 and 2 be represented as polygons?

How many factor polygons can you draw for a ring of 32 dots?

How many polygons can you draw for a ring of 20 dots?