Many have heard it, but nobody has ever seen it, and it will not speak back until spoken to. What is it?

What can you see in the middle of March and April that you can never see in any other month?

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

Which Number is the odd one out?

A) 7145
B) 2716
C) 5321
D) 4135

What will be the best approach to finding all the prime numbers less than 75 that leave an odd reminder when we divide them with 5?

At a bar, three friends, Mr Green, Mr Red and Mr Blue, were having a drink. One man was wearing a red suit; one a green suit; and the other a blue suit. 'Have you noticed,' said the man in the blue suit, 'that although our suits have colours corresponding to our names, not one of us is wearing a suit that matches our own names?' Mr Red looked at the other two and said, 'You're absolutely correct. What colour suit is each man wearing?

A lion and its tamer are standing inside a cage that measures 1 unit in radius. Both of them can effortlessly run at the speed of 1 unit maximum.

1) Suppose the lion is hungry, will he be able to eat up the tamer?
2) If yes, how long can the tamer survive?

I speak without a mouth, and hear without ears. I have no-body, but I come alive with the wind. What am I?

What is the unique property of the following words ?
* Revive
* Banana
* Grammar
* Voodoo
* Assess
* Potato
* Dresser
* Uneven

Is the statement valid that it does not matter how much older a sibling is, eventually the younger one will be half as old as the older one?