A man ate 100 apples in the past five days. Each day he ate 6 more apples than the previous day. How many did he eat on the 4th day?

A doctor and a nurse have a baby boy. But the boy’s father is not the doctor and the mother is not the nurse. How can it be?

In a rectangular dance hall, how do you place 10 chairs along the walls so that there are an equal number of chairs along each wall?

We hurt without moving. We poison without touching. We bear the truth and the lies. We are not to be judged by our size. What are we?

A drove of sheep and chickens have a total of 99 heads and feet. There are twice as many chickens as sheep. How many of each are there?

If the end of the world should come on the first day of a new century, can you say what are the chances that it will happen on a Sunday?

You have two hourglasses, a 7 minute one and an 11 minute one. Using just these two hourglasses, how can you accurately time 15 minutes?

A smart landscaper is given the task of placing 4 trees so that they are all the same distance away from each other. How does he do this?

You are in a room with no metal objects except for two iron rods. Only one of them is a magnet. How can you identify which one is a magnet?

There are 6561 balls. Out of them 1 is heavy. Find the minimum number of times the balls have to be weighed for finding out the heavy ball.

What is wrong with the following proof? 2=1 a = b a2 = ab a2 – b2 = ab – b2 (a+b)(a-b) = b(a-b) a + b = b 2b = b 2 = 1

What has everything inside it? Everything you can imagine. Even God, wind, world, sky, heaven, earth and everything that comes to your mind?

A man has $1.15 in six coins. He can’t make change for a dollar, a half dollar, a quarter, a dime, or a nickel. What coins did he have?

I recently returned from a trip. Today is Friday. I returned four days before the day after the day before tomorrow. On what day did I return?

Candace is Jane’s daughter’s aunt’s husband’s daughter’s sister. What is the relationship between Candace and Jane?