How can a man go eight days without sleep?

Find The Missing Number In the Sequence.
6 25 64 ? 32 1

There are forty elephants and they have forty-fore heads. How can this be possible?

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 _

An explorer goes on an exposition in the jungle. He sets up camp in the middle of the jungle. The next morning he sees something with a head and a tail, but he is not afraid. What did he see in his bag?

I’m light as a feather, yet the strongest person can’t hold me for five minutes. What am I?

John was a very careless driver, so his owner Jacob gave him an offer that he will get an incentive of Rs.30 for every bottle box he delivered without breaking it and he will be charged Rs.90 for every bottle box he broke. Jacob gave John 100 bottles-box to deliver. After delivery, Jacob paid John Rs.2400. How many bottles-box did John break?

You have a 12 liters jug full of water. You have two empty 8 liters and 5 liters jug. How can you divide the water into two equal parts using these jugs?

Find the next number in the series?
2, 12, 36, 80, 150, 252, 392, _ ?

What does the below image rebus riddle means ?