I have no doors but I have keys, I have no rooms but I have space, you can enter but you can’t leave! What am I?

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

Replace the question mark in the picture below.

I am a seven-letter word but if you remove four of my letters I will have one left. What word am I?

Can you find the odd number in the following?

2716, 4135, 5321 and 7145

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?

I am a white box having no key or lid.
Yet there is a golden treasure inside it.

What Am I?

A 3 digit number is such that it's unit digit is equal to the product of the other two digits which are prime. Also, the difference between it's reverse and itself is 396.

What is the sum of the three digits?

Can you figure out the logic I used to decide the order of the following words:
gun, shoe, spree, door, hive, kicks, heaven, gate, line, den

I am first found in caves, now prolific online; I am a depiction, a drawing, a symbol, or sign. I will convey whichever mood you could wish; or for that matter, a fist, flask, or fish. What am I?