How can one talk without saying a single word?

How is the moon similar to a dollar?

Decode the below four famous ciphers:

8P of the SS
1M of the E
1S of the SS
60M in 1H

Can you find out which triangle will have a bigger area among the following?
1. A triangle with sides 300, 400 and 500
2. A triangle with sides 300, 400 and 700

I have cities, but no houses. I have mountains, but no trees. I have water, but no fish. What am I?

What is the next number in this matchsticks series riddle?

Can you calculate the probability of getting a sum of six when a dice is thrown twice?

What seven-letter word has hundreds of letters in it?

Can you find out the missing number in the grid?

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?