Which is the smallest number that you can write using all the vowels exactly once?

What does the following BrainBat signifies?

ABCDEFGHIJKLMNOPQRSTUVWYZ

QQQQQQQQQQQQQQQQQQQQQQQQQ.

What number comes next in this sequence:
7 8 5 5 3 4 4 _

A wealthy man lives alone in a small cottage. Being partially handicapped he had everything delivered to his cottage. The mailman was delivering a letter one Thursday when he noticed that the front door was ajar. Through the opening he could see the man's body lying in a pool of dried blood. When a police officer arrived he surveyed the scene. On the porch were two bottles of warm milk, Monday's newspaper, a catalog, flyers, and unopened mail. The police officer suspects it was foul play. Who does he suspect and why?

What is black when you buy it, red when you use it, and gray when you throw it away?

If eleven plus two equals one, what does nine plus five equal?

Forwards I am heavy, backward I am not. What am I?

What is the next number in this series?

4,12,84,3612....

Replace the question mark with the number below given a simple math problem.

Move three sticks of the spiral below to form a square.