Can you find out the missing number in the grid?

Can you find the hidden animal in the picture below?

What 4-letter word can be written forward, backward or upside down, and can still be read from left to right?

You have to put a letter on the following to make it a meaningful word. The only challenge is that you can't use 'E'.

S E Q U E N C _

How many triangles can you find in this given picture?

Using eight eights and addition only, can you make 1000?

Can you count the number of squares in the figure below?

How can you drop a raw egg from a height onto a concrete floor without cracking it?

You are in a room that has three switches and a closed door. The switches control three light bulbs on the other side of the door. Once you open the door, you may never touch the switches again. How can you definitively tell which switch is connected to each of the light bulbs?

The captain of a ship is telling you an interesting story and then poses a question. He says, “I have travelled the oceans far and wide. One time, two of my sailors were standing on opposite sides of the ship. One was looking west and the other one east. And at the same time, they could see each other clearly. Can you tell me how that was possible?”