You are presented with three boxes. One of them has a red ball inside and the other two have a black ball inside each of them. You are asked to pick up the one with red ball and you pick one. Now, one of the other boxes is opened and it is found to have a black ball.

You are presented with a chance to change your box with the one that is left closed. Will you change your box? Why or why not?

How many cubic feet of dirt are in a hole of one foot deep, three feet long, and two feet wide?

You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?

Complete the table series riddle by finding the number that can replace "??".

The barber of Town shaves all men living in the town. No man living in the town is allowed to shave himself. The barber lives in that town. Who then shaves the barber of the town?

What is the probability of choosing the correct answer at random from the options below?

a) 1/4
b) 1/2
c) 1
d) 1/4

What is the word or phrase?

There are 2 sand hourglasses.

The small one can measure 5 hours and the large one can measure 7 hours.

How can we measure 16 hours with 2 sand hourglasses running together ?

What is harder to catch the faster you run?

What word begins and ends with an E, but has only one letter?