I am quite hot but become too cold if you remove the first two letters. What am I?

Which is faster, Heat or Cold ? Explain.

Tell me the Hindi name of a Vegetable which if we remove 1st word will become a precious Stone and by removing the last word it will become a sweet eatable.

My thunder comes before the lightning; my lightning comes before clouds; my rain dries all the land it touches. What am I?

Can you find out the remainder when 3^300 is divided by 5?

I know a ten-letter word in the English language which can be typed using only the top rows of the computer keyboard.

Which tank will fill first?

I have a hole in my back and legs I lack.
I live where I can’t breathe and I eat without teeth.
What am I?

Spelt forwards I’m what you do every day, spelled backwards I’m something you hate. What am I?

A man desired to get into his work building, however he had forgotten his code.
However, he did recollect five pieces of information
* Fifth number + Third number = 14
* The fourth number is one more than the second number.
* The first number is one less than twice the second number.
* The second number and the third number equals 10.
* The sum of all five numbers is 30.

What is the code ?