What is the fastest way to double your money?

Below, you can see some coding:
January = 1017
February = 628
March = 1335
April = 145
May = 1353
June = 1064
July = 1074
August = 186

Now deciphering the way it has been coded, can you find out how September will be coded?

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?

What have one eye but still cannot see?

What is the centre of gravity?

What's a single-digit number with no value?

Identify the hidden meaning behind this picture?

10+10 and 11+11 can give you the same answer.

Explain how?

Here is a mathematical expression that also secretly tells a movie name. What movie is that?

Complete the table series riddle by finding the number that can replace "??".