There is a square of a particular number which when doubled, becomes 7 more than its quarter.

Can you find the number?

Look at the below sequence of letters and tell us what the next letter should be:

O T T F F S S ?

There are three boxes which are labeled as Rs100, Rs150, and Rs200. One box contains two notes of Rs. 50. The second box contains one note of Rs50 and one note of Rs100 The third box contains two Rs. 100 notes. All boxes are labeled incorrectly.

What is the minimum number of boxes you must check in order to label all boxes correctly?

What do you see in the image below

They came out at night, without being called.
They lost at day, without being stolen.
Who are they?

The captain of a ship is telling you an interesting story and then poses a question. He says, “I have travelled the oceans far and wide. One time, two of my sailors were standing on opposite sides of the ship. One was looking west and the other one east. And at the same time, they could see each other clearly. Can you tell me how that was possible?”

What do you answer even though it never asks you questions?

Here is a mathematical expression that also secretly tells a movie name. What movie is that?

I make a loud sound when I’m changing. When I do change, I get bigger but weigh less. What am I?

Two friends Smith and Andrew were talking about the bravery of their families. Smith told great stories about his courageous grandfather who fought for Britain in "World War I". Andrew told that his grandfather was so brave that in 1919 just after the war he was honoured with a bravery medal with the words "For our Courageous Soldiers In World War I" embedded into it. Smith knows that his friend is lying. How?