What does this below rebus puzzle mean?

John replied, when asked how old he was. In 2 years he will be twice as old as he was five years ago.' How old is he ?

If a boy blows 18 bubbles,
Then pops 6 eats 7 and then
He pops 5 and blows 1.
How many are left?

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?

Replace the question mark with the correct number, given the pair of numbers exhibits a similar relationship?

? : 3839 :: 11 : 1209

15 caves are arranged in a circle at the temple of doom. One of these caves has the treasure of gems and wealth. Each day the treasure keepers can move the treasure to an adjacent cave or can keep it in the same cave. Every day two treasure seekers visit the place and have enough time to enter any two caves of their choice.

How do the treasure seekers ensure that they find the treasure in the minimum number of possible days?

Can you find out a way through which you can make five squares out of the given figure by moving just six match sticks?

It has horns but can’t beep. It is like to bleat but It is not a sheep. What is it?

There is a square of a particular number which when doubled, becomes 7 more than its quarter.

Can you find the number?

Can you find the mistake in the below statement?