What is both possible and impossible at the same time?

Three people are in a room. Ronni looks at the Nile. The Nile looks at Senthil. Ronni is married but Senthil is not married. At any point, is a married person looking at an unmarried person? Yes, No or Cannot be determined.

I have a mouth but I don't eat.
I have a bank but have no money.
I have a bed but i dont sleep.
I wave but have no hands.

Who Am I ?

Solve the puzzle by telling what does below picture means.

Can you fill the blank with the correct number?

6 30 870 756030 _____

There are two candles. Both will only burn exactly for an hour. How will you use these two candles to measure forty-five minutes?

You are mixing a mixture of cement and Sand with five gallons of water. You have a garden hose giving you all the water you need. The problem is that you only have a four-gallon bucket and a seven-gallon bucket and neither has graduation marks. Find a method to measure five gallons.

There is a square of a particular number which when doubled, becomes 7 more than its quarter.

Can you find the number?

f you were running a race, and you passed the person in 2nd place, what place would you be in now?

Replace the question mark with the correct number, given the pair of numbers exhibits a similar relationship?

? : 3839 :: 11 : 1209