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

I have Rs.50 and I spend it in the way as below.

If I remove one from eleven it becomes Ten and if I remove one from nine also becomes Ten. How?

What does this mathematical rebus means ?

A man is found unconscious in front of a store at two in the morning. His head is bleeding and there’s a brick laying next to him. When the police arrive, they carry the man to jail. Why did they arrest him?

There is an ancient kingdom where every married woman keeps information regarding the fidelity of other men. However, what they don't know is the fidelity of their own husbands. Also, there is an ancient belief that they don't tell each other about the fidelity of their husbands.

On a certain day, the queen of the kingdom declares that she has identified at least one unfaithful man in the kingdom. She allows the wives to identify and gives them authority to kill their husbands if they are unfaithful at midnight.

How will the wives manage it?

Can you name some countries which do not have the alphabet 'A' in them?

Find the next number in the series below

21 32 54 87 131 ?

Replace the 'X' with any mathematical symbol to make the expression equal to 111.

18 X 12 X 2 X 3 = 111

I am weightless, but you can see me. Put me in a bucket, and I'll make it lighter. What am I?