Arrange the numbers 1, 2, 3, 4, 5, 6, 7, 8 and 9 above and below the division line in a manner that the thus formed fractions equal to 1/3.

(You can use one number only once)

There is one four-digit whole number n, such that the last four digits of n2 are the original number n

Replace the question mark with the correct number, given the pair of numbers exhibits a similar relationship?

? : 3839 :: 11 : 1209

Give it food and it will live; give it water and it will die.

If you remove one from eleven, it becomes ten. If you remove one from nine, it becomes ten.

How is this possible?

Three playing cards in a row. Can you name them with these clues? There is a two to the right of a king. A diamond will be found to the left of a spade. An ace is to the left of a heart. A heart is to the left of a spade. Now, identify all three cards.

What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see? What is it?

Solve below popular number sequence
314 159 265 358 979 323 846 ?

There are 2 cops parked along a one-way street looking for traffic violations. They spot a taxi driver going in the wrong direction, yet they do nothing.

Why?

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

When did John make this statement?