I am the one who remains awake when you sleep. But I need to rest when you awake. Who Am I?

Find the missing number in the sequence below:

Solve the mathematical equation in the picture below.

Move four matchsticks to the below square to form three squares?

Find the next number in the series.
1 10 24 43 67 ?

Can you place six X (crosses) in below board without making three in a row in any way ?

A worker is to perform work for you for seven straight days. In return for his work, you will pay him 1/7th of a bar of gold per day. The worker requires a daily payment of 1/7th of the bar of gold. What and where are the fewest number of cuts to the bar of gold that will allow you to pay him 1/7th each day?

Can you spot the hidden girl in the picture below?

By moving exactly three matchsticks can you make the below equation true.It can be solved by 3 ways.

An office is divided into 8 cubicles. How many of the cubicles are painted if only 1/8 of the cubicles are painted?