How many times in a given day, minutes and hour clock comes in a straight line ?

I am a five-letter word and people eat me. If you remove the first letter I become an energy form. If you remove the first two letters, I am needed to live. Scramble the last three letters and I am a drink. What word am I?

Replace the question mark with the correct number below.

If Rajina's daughter is my daughter's mom, who am I to Rajina?

Assume there are approximately 5,000,000,000 (5 billion) people on Earth. What would you estimate to be the result, if you multiply together the number of fingers on every person's left hand? (For the purposes of this exercise, thumbs count as fingers, for five fingers per hand.) If you cannot estimate the number then try to guess how long the number would be.

Can you identify the Oscar-winning movie from the rebus below?

What does does this rebus picture means ?

In the picture that is attached with this question, you can find a square which comprises of four little squares inside it. Consider this square to be made with matchsticks. You have to remove two matchsticks such that only two squares remain instead of five.How will you do it ?

What is the fewest number of coins that would be required in order to make sure each and every coin touches exactly three other coins?

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