How can one talk without saying a single word?

Take away my first letter, then take away my second letter. Then take away the rest of my letters, yet I remain the same. What am I?

A man has eighty-one cows ( numbered 1,2,3...81 as such). The beauty is that cow no. 1 gives 1ltr of milk, cow no. 2 gives 2ltrs of milk and so on. The man wants to equally distribute the cows among his nine sons so that each one of them gets the same quantity of milk.

If it took eight men ten hours to build a wall, how long would it take four men to build it?

In the picture given below, can you find out which digit will take place of the question mark?

By what process could you make a 'Tea-Table' into food?

Known by all without exception, Forever here, for your protection, Sometimes strong, sometimes weak, Right after the night I come - hot and chic. And while millions of miles away, I always get to you, I find my way. No life around could do without me, Can you guess what I might be?

How many cubic feet of dirt are in a hole of one foot deep, three feet long, and two feet wide?

On a bus, there is a 26-year-old pregnant lady.
A 30-year-old policeman.
A 52-year-old random woman.
And the 65-year-old driver.

Who is the youngest?

An office is divided into 8 cubicles. How many of the cubicles are painted if only 1/8 of the cubicles are painted?