Can you solve this amazing hard number series problem?
7, 8, 10, 12, 16, 18 ?

Can you tell a 3D object that has just two surfaces?

Look at this sequence from top to bottom. What is the next number in the sequence?
1
11
21
1211
111221
312211

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

Until it is measured, not known. Yet how you miss it when it has gone. What is it?

Whats the next number in the below number sequence pattern.

A chicken farmer has figured out that a hen and a half can lay an egg and a half in a day and a half. How many hens does the farmer need to produce one dozen eggs in six days?

Two girls were born to the same mother, on the same day, at the same time, in the same month and year and yet they're not twins. How can this be ?

In the image below, can you find the value of an angle(y)

If eleven plus two equals one, what does nine plus five equal?