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

I am a word of 12 alphabets.

* Alphabets 12, 4, 7, 2, 5 : Eastern beast of burden
* Alphabets 1, 8, 10, 9 are street made famous by Sinclair Lewis.
* Alphabets 11, 3, 6 are past.

On whole it means a person suffering from delusions of greatness.

What Is it ?

Find the hidden tiger in the given optical illusion ?

I don't get anymore wetter, no matter how much rain falls on me.

A man dies of old age on his 25 birthday. How is this possible?

Using eight eights and addition only, can you make 1000?

The Federal bank of London is abducted by the robbers. The head of the robbers asked the cashier to empty their money vault to them and when suddenly cashier got a call from her father. To avoid any suspicion, the robber asked the cashier to pick the call and reply her father in the shortest manner possible.

The cashier told her father "Is there an emergency father, Call me when you are free and I will help you in your furnishing" and then the cashier hung up the phone.

After 10 minutes, police arrived at the crime scene.

How did the police know about the robbery?

how come the second man dies?

What number does the below three word/phrase identify and why?
1. Deck
2. Year
3. Singing in the Rain

There was a strange boy who was born before his father. How can this be possible?