How many points are there on the globe where, by walking one mile south, then one mile east and then one mile north, you would reach the place where you started?

Can you find the missing letter in the sequence?
S - T - I - L - ? - T - F - Y - C

John said, "If yesterday was tomorrow, today would be Friday."

When did John make this statement?

There is a place where if I stand up straight, I will still be considered sideways.

2, 3, 5, 9, 17, _ What is the next number in the sequence?

At a party, there are five people and a whole round cake lying at the centre of the table. Only four people will make a cut and take their piece and the last one will get the remaining piece on the table. How can they make sure that everyone gets a 1/5th of the piece?

I guess 76.8% of readers will like this riddle.

What's the least number of people should read this post?

After teaching his class all about Roman numerals (X = 10, IX=9 and so on) the teacher asked his class to draw a single continuous line and turn IX into 6. The teacher's only stipulation was that the pen could not be lifted from the paper until the line was complete.

You walk into a room that contains a match, a kerosene lamp, a candle and a fireplace. What would you light first?

A boy collects white seashells from the sea and brings them home every night. When he has enough of them, he decides to sell them to a trader.

The trader is ready to buy the shells and he asks the boy about the quantity. At this, the boy starts calculating. He has a giant box that contains 3 mini boxes. Two of them have another mini box inside. If the giant box can hold 50 shells, how many brown shells can he sell to the trader?