It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?

You have a thousand Re. 1 coins with you. You have ten bags with you and you can put any number of coins in each of the bags. The condition is that if someone asks you for any amount between 1 and 1000, you must be able to give that amount by just giving the bag (you are not allowed to open the bag and give coins).

How will you do it?

Irene killed hundreds of people mercilessly and yet the police were not able to put her behind the bars. Why?

12345 a famous South Indian actor
567 is a path in jumbled form
8 & 10 are same letters
9 is one among the first six alphabets.
WHO AM I?

Look at the picture and find out which square is not linked with any of the other squares.

This is a famous paradox which has caused a great deal of argument and disbelief from many who cannot accept the correct answer. Four balls are placed in a hat. One is white, one is blue and the other two are red. The bag is shaken and someone draws two balls from the hat. He looks at the two balls and announces that at least one of them is red. What are the chances that the other ball he has drawn out is also red?

10+10 and 11+11 can give you the same answer.

Explain how?

You can see it everyday, But cannot touch it at will. What is it?

You can take four of the five letters out of this word, but the pronunciation never changes. What is the word?

What makes this number unique: 8,549,176,320?