Look at this sequence from top to bottom. What is the next number in the sequence?
1
11
21
1211
111221
312211

How many words can a pen with half refill write?

There is a unique number which when multiplied by any number from 1 to 6, we will get the new number that contains the same digits only.

Can you find that number?

Two-person want to cross a river. Only one boat is present on the riverside that can carry only one person at a time.

However, they still manage to cross the river. How is it possible?

There are are five things wrong with this sentence; only geniuses will be able to to spot all of the mitstakes

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?

I have lakes with no water, mountains with no stone and cities with no buildings. What am I?

Find the mistake in the below maths equations

A = 2
A(A-1) = 2(A-1)
A2-A = 2A-2
A2-2A = A-2
A(A-2) = A-2
A = 1

I can be made.
I can be cracked.
I can be told.
I can be played.

Who am I?

Find the last number in the series below:

voN luJ yaM raM ---