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?

With the help clues provided in the image, can you find the 5 digit key?

Find the next number in the series?
2, 12, 36, 80, 150, 252, 392, _ ?

What is next number in the pattern below:

131 517 192 123 ?

What do you see in the given picture?

I am five letter word that is under you.
If you remove my 1st letter, then I am over you.
If you remove my 1st and 2nd letters then I am all around you.

Who am I?

Find a 9-digit number, which you will gradually round off starting with units, then tenth, hundred etc., until you get to the last numeral, which you do not round off. The rounding alternates (up, down, up ...). After rounding off 8 times, the final number is 500000000. The original number is commensurable by 6 and 7, all the numbers from 1 to 9 are used, and after rounding four times the sum of the not-rounded numerals equals 24.

What is the fastest way to double your money?

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

As easy as you can get into me, it is as hard to get out of me.

Do you know what I am?