How many times can you subtract the number 5 from 25?

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

A bomb goes off.
Carnage.
One person, only a few feet away, survives! How can this be?

Can you find out which number multiplied by itself will give the output as 12345678987654321?

What is the coolest letter in the alphabet?

What has one eye, but can’t see?

I have a big mouth and I am also quite loud! I am NOT a gossip but I do get involved with everyone's dirty business.

A wooden log balances equally on the scales when weighed with three-quarters of a pound and three-quarters of a wooden log.

Can you calculate the weight of the entire wooden log?

I inserted a coin in a bottle and closed its mouth with the help of a cork. Now, I was able to take the coin out from the bottle without taking out the cork or breaking the bottle. Can you tell me how I did it?

When I get multiplied by any number, the sum of the figures in the product is always me. What am I?