How can one talk without saying a single word?

Find the missing number in the sequence below:

What can you catch but never throw?

I look at you, you look at me, I raise my right, you raise your left. What am I?

The horse jumps over the king.
Strangely there is absolutely no scratch on him.

Can anyone explain, how is this possible?

If you drop me I’m sure to crack, but give me a smile and I’ll always smile back. What am I?

Prove that the below maths equation is true.

8 + 8 = 91

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?

What three numbers, none of which is zero, give the same result whether they’re added or multiplied?

A pack of cards has 40 cards. You are blindfolded. Out of 40, 25 cards are facing down while 15 are facing up. You have been asked to divide this pack of cards into two decks - so that each deck contains an equal number of face-up cards. Remember, you are blindfolded.

How will you do it?