Can you find out the next digit in the following series ?

0, 0, 1, 3, 2, 6, 3, 9, 4, 12, 5, ?

A worker is to perform work for you for seven straight days. In return for his work, you will pay him 1/7th of a bar of gold per day. The worker requires a daily payment of 1/7th of the bar of gold. What and where are the fewest number of cuts to the bar of gold that will allow you to pay him 1/7th each day?

O_er_t_o_

Complete the missing letters of the given word.

How many bananas can you eat if your stomach is empty?

Yesterday I fell from 30 feet high ladder but I don't get hurt. Why?

Solve the alphametic puzzle by replacing the alphabet with the number.

S T O R M +
S O L E S
=========
T O W E L
=========

This is a classy optical illusion puzzle. What more you can find except bricks in the image below?

A mother bought three dress for her triplets daughters(one for each) and put the dresses in the dark. One by one the girls come and pick a dress.
What is the probability that no girl will choose her own dress?

Find out the number of circles in the given picture having Illusion

What number does the below three word/phrase identify and why?
1. Deck
2. Year
3. Singing in the Rain