Can you find a number that lies one third of the distance between 1/3 and 2/3?

I am the black child of a white father, a wingless bird, flying even to the clouds of heaven. I give birth to tears of mourning in pupils that meet me, even though there is no cause for grief, and at once on my birth, I am dissolved into air. What am I?

No matter how little or how much you use me, you change me every month. What am I?

In two decks of cards, what is the least amount of cards you must take to be *guaranteed* at least one four-of-a-kind?

If six children and two dogs were under an umbrella, how come none of them got wet?

What's the best place to go shopping in the ocean?

What question can you never answer yes to?

Replace the question mark with the correct number below.

How many pluses should we put between the digits of 987654321 to get a total of 99, and where?

What kind of band never plays music?