A mile-long train is moving at sixty miles an hour when it reaches a mile-long tunnel. How long does it take the entire train to pass through the tunnel?

Can you identify the hidden rebus in the image below?

There are 20 people in an empty, square room. Each person has full sight of the entire room and everyone in it without turning his head or body, or moving in any way (other than the eyes). Where can you place an apple so that all but one person can see it?

Make a sentence consisting of three words that have the whole alphabet.

Which city is three-fifths chick two third cat and 50% goat?

What four weights can be used to balance from 1 to 30 pounds?

Look at this sequence from top to bottom. What is the next number in the sequence?
1
11
21
1211
111221
312211

The person who makes it has no need for it; the person who buys it has no use for it. The person who uses it can neither see nor feel it. What is it?

I am a normal creature, but I have five hands. I can even have more but even then I will be considered normal.

Who am I?

If you’ve got me, you want to share me; if you share me, you haven’t kept me. What am I?