Which Number is the odd one out?

A) 7145
B) 2716
C) 5321
D) 4135

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

Can you find the number?

The first box has two white balls. The second box has two black balls. The third box has a white and a black ball.

Boxes are labeled but all labels are wrong!

You are allowed to open one box, pick one ball at random, see its colour and put it back into the box, without seeing the colour of the other ball.

How many such operations are necessary to correctly label the boxes?

I have eight fingers and two thumbs but I do not live. What Am I?

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

You need to complete the maze by entering from the entrance marked below in the figure near the yellow circle, bottom left and leaving from the exit point near the green circle, bottom middle.

Rule of Game: You can move only by exchanging green and yellow circles.

By moving exactly three matchsticks can you make the below equation true.It can be solved by 3 ways.

I make a loud sound when I’m changing. When I do change, I get bigger but weigh less. What am I?

Count the number of squares in the picture below.

In the figure, you can see nine stars. What you have to do is connect all of them by using just four line and without lifting your hand i.e. in a continuous flow.