Can you arrange four 9's and use at most 2 math symbols, to make the total 100?

Find out a multi-digit number that if multiplied by the number 9 or any of its multiplications products (i.e. 18, 27, 36, 45,..) will result in the multiplication factor repeated (n) number of times.

John speaks the truth only once a day in a week. Below are a few hints for you:

First: Days are Sunday, Monday and so on.
Second: One day he says, "I lie on Monday and Tuesday".
Third: On the next day, he says, "Today is either Thursday, Saturday or Sunday".
Fourth: On the next day, he says, "I lie on Wednesday and Friday".

Can you identify the day on which he speaks the truth?

He does not have any heart but still, He manages to live.
If you kill him, you will eventually die but yet you kill him.
He cannot run, who is He?

What begins with T, ends with T, and has T in it?

A bomb exploded in a room full of married couples and no one died. How?

Can you complete the sequence?

192, 021, 222, 324, 252, 627, 2__, 9__?

The person who makes it has no need for it; the person who buys it has no use for it. The person who uses it can neither see nor feel it. What is it?

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

What does does this rebus picture means ?