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

In a secret society, a buried chamber can be accessed only via a secret password. The password is seven characters long and comprises of just letters and numbers.

You find a code that can help you in cracking the password. The code says "You force heaven to be empty".

Can you deduce the password from that?

Which three-digit number, made of consecutive digits, like 567, is 2 less than a cube and 2 more than a square?

How many minutes are there in Feb 2017?

Note: The shortest answer is the correct answer.

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

In Greek mythology, the Sphinx sat outside of Thebes and asked this riddle of all travellers who passed by. If the traveller failed to solve the riddle, then the Sphinx killed him/her. And if the traveller answered the riddle correctly, then the Sphinx would destroy herself. The riddle:

What goes on four legs in the morning, on two legs at noon, and on three legs in the evening?

Oedipus solved the riddle, and the Sphinx destroyed herself.

How can you drop a raw egg from a height onto a concrete floor without cracking it?

Can you count the number of quadrilaterals in the picture below?

The ages of a father and son add up to 66.
The father's age is the son's age reversed.
How old could they be?
(3 possible solutions).

Can you divide the below-given shape into four equal and identical pieces?