Can you place six X (crosses) in below board without making three in a row in any way ?

What is the coolest letter in the alphabet?

How can you drop a raw egg from a height onto a concrete floor without cracking it?

John said, "If yesterday was tomorrow, today would be Friday."

When did John make this statement?

There was a greenhouse.
Inside the greenhouse, there is a white house.
Inside the white house, there is a red house.
Inside the red house, there are lots of babies.

What is It?

There are two candles. Both will only burn exactly for an hour. How will you use these two candles to measure forty-five minutes?

Outside a massage parlour, there is a board that reads
"I only massage those who do not massage themselves."

Reading the above statement, does the masseur massage himself?

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?

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

How many runs at maximum can a batsman score in a normal one-day match? Consider the fact that the conditions are ideal and there are no No Balls, no Wide Balls and no Extras in that match.