What is the word or phrase?

Find the missing letter in the last circle logically in the given below picture.

We know that the number 7 is the prime followed by a cube. Which next number is also a prime followed by a cube?

A maths symbol is hidden in the below Bar Graph. Can you decipher it?

You board a train. The train will have to enter a tunnel soon. You are claustrophobic. Which place is the best for you to sit?

Intelligence Agency need to break the vault but the problem is that they are not able to break the vault.

On the vault, a text is written as:

31 11 33 33 43 45
21 25
31 24 11 31 51 41

To Break the code Intelligence Agency brings a mathematician named Joseph.
Minutes later he deciphers the code.

Whats the code?

If nine thousand, nine hundred nine dollars is written as $9,909,
how should twelve thousand, twelve hundred twelve dollars be written?

How many triangles can you count in the figure given?

John was drowned by he was not wet. How?

There is a place where if I stand up straight, I will still be considered sideways.