Recent Riddles & Brain Teasers

In the given figure, you can see that there are four circles numbered from 1 to 4. In the fourth circle, a digit is missing. Can you find out a relation and tell which number will suffice the pattern?

A swimming pool has four faucets. The first can fill the entire pool with water in two days, the second in three days, the third in four days, and the last one can fill the pool in 6 hours.
How long will it take to fill the pool using all 4 faucets together?

100 birds were sitting on a tree.
A shooter shoots one of the birds and the bird dies instantly.

How many are left now?

You are in a dark room and want to see what is inside it. With you are a match, a candle, and a kerosene lamp. Which do you light first?

Assume you have the white pieces, can you win in half a move?

Can you replace the "?" in the picture table below with the appropriate numbers?

The equation shown below is not correct:

26-63=1

Can you make the equation correct by moving just one symbol?

Given the numbers between 1 and 1 million, what is so special about the number 40 that it makes the number stand out of the crowd?

Pooja gave Neha as many Ponds as Neha started with.
Neha then gave Pooja back as much as Pooja had left.
Pooja then gave Neha as back as many Ponds as Neha had left, which left Pooja broke and gave Neha a total of 80 pounds. How much did Pooja and Neha have at the beginning of their exchange?