You need to arrange three 7 and mathematical symbols to form number 1?

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

Find The Missing Number In the Sequence.
6 25 64 ? 32 1

You are in a land where thirty men and two women were dressed in classic black and white dresses.
They begin to fight as soon as any of them move.

Where are you?

Twenty frogs are sitting on a log floating on the surface of a river. Two of them decide to jump off into the water.

How many frogs are there on the log at this moment?

You need to pick one entry from pot A and one from pot B to have a perfect match. Can you do it?

What is the longest word in the dictionary?

This puzzle is for Harry Potter fans. Do you know why Tom Riddle is called Lord Voldemort?

I am under you when I am whole.
I shift above you if you remove the first letter.
I come all around you if you remove the second as well.

Can you tell me who I am?

In the city of Brain Teasers, 5% of people do not list their phone numbers. Now if we select random 100 people from the phone directory, then how many people selected will have unlisted phone numbers?