Math

If two is a company and three is a crowd, what are four and five?

related riddles

Add me to myself and multiply by 4. Divide me by 8 and you will have me once more. What number am I?

If you multiply this number by any other number, the answer will always be zero. What number is this?

8, 5, 4, 9, 1, 7, 6, 3, 2 These numbers are in a specific order. What is the pattern?