The square root of number 121 is "11". What is the square root of the number "12345678987654321."?

What is in seasons, seconds, centuries and minutes but not in decades, years or days?

Which point will the car reach to go out?

A rain drop fell from one leaf to another leaf and lost 1/4th of its volume. It then fell to another leaf and lost 1/5th of the volume. It again fell on another leaf and lost 1/5th of the volume.



This process kept repeating till it fell on the last leaf losing 1/75th of its volume.



Can you calculate the total percentage of loss from the initial volume when the drop has fallen to the last leaf accurate up to two decimal places?

You knock a Table over in the library, and suddenly 20 eyes are looking at you.

This puzzle is for Harry Potter fans. Do you know why Tom Riddle is called Lord Voldemort?

How high do you have to count before you use the letter “a” in the English spelling of the whole number?

The host of a game show offers the guest a choice of three doors. Behind one is an expensive car, but behind the other two are goats.
After you have chosen one door, he reveals one of the other two doors behind which is a goat (he wouldn't reveal a car).

Now he gives you the chance to switch to the other unrevealed door or stay at your initial choice. You will then get what is behind that door.

You cannot hear the goats from behind the doors, or in any way know which door has the prize.

Should you stay, or switch, or doesn't it matter?

In this image, you can see three almost identical Doraemon images. Can you spot the odd one out from them?

Alpha is Beta's sister.

Gamma is a Beta mother.

Delta is Gamma's father.

Tango is Delta's mother.

Then,

How is Alpha related to Delta?