What does it mean?

People put me on the table and cut me but do not eat me. What am I?

During which month do people sleep the least?

You need to move three matchsticks to form three squares. Can you do it?

Find a 9-digit number, which you will gradually round off starting with units, then tenth, hundred etc., until you get to the last numeral, which you do not round off. The rounding alternates (up, down, up ...). After rounding off 8 times, the final number is 500000000. The original number is commensurable by 6 and 7, all the numbers from 1 to 9 are used, and after rounding four times the sum of the not rounded numerals equals 24.

Can you identify the hidden rebus in the image below?

The answer I give is yes, but what I mean is no. What was the question?

You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?

What does this rebus riddle means ?

Can you find out the remainder when 3^300 is divided by 5?