It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?

He does not have any heart but still, He manages to live.
If you kill him, you will eventually die but yet you kill him.
He cannot run, who is He?

Count the squares in the matchstick puzzle below?

Can you find the largest Three-digit number whose sum is 14 and whose square is less than 5,00,000?

I have four wings but can't fly.
I express no emotions.
I am found on the exact spot every time you look.
I keep toiling away with a little sound.

Do you know what am I?

Make eight squares by moving only two matchsticks.
Note- Square can be of different sizes.

Spot 5 differences in two Christmas tree below:

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?

You need to arrange three 7 and mathematical symbols to form number 1?

Can you decipher the two rows to find the hidden word?