How can one talk without saying a single word?

How can you throw a ball as hard as you can and have it come back to you even if it doesn't hit anything there is nothing attached to it and no one else catches or throws it.

Can you replace the question mark with the correct number?

What number should come in place of the question mark below?

John drives to his office at 20km/hr. After reaching the office, he realizes that today is a holiday. He went back at an average speed of 30km/hr. Discounting the time spent in the stoppage what was the average speed of his journey?

Can you make a six-letter word using the letters N, A and B ?

In the given picture, in how many ways can you read the word "Tiger"?

What is always in front of you but can’t be seen?

The picture shows the dice results in each couple of throws. If they are actually following a pattern, can you find out the missing one?

Solve The below Equation:

ALFA + BETA + GAMA = DELTA