I throw two dice simultaneously.

What is the probability of getting a sum as 9 of the two numbers shown?

What is the largest amount of money that you can possess in change and still if someone asks you for a dollar, you won't be able to give?

What number when divided in half becomes zero?

What is the centre of gravity?

I have one of the three numbers: 1, 2, or 3 in my mind. I speak only truth. You can ask me just one question for which I will only reply in yes or no or don't know. What question will you ask from me so that you are able to know the number?

A finger goes in me. You fiddle with me when you're bored. The best man always has me first. What am I?

Why do we preferably have round manhole covers and not square ones?

A convention is held where all the big logicians are summoned. The master places a band on everyone's forehead. Now all of them can see others bands but can't see his own. Then they are told that there are different colours of bands. All the logicians sit in circle and they are further explained that a bell will ring at regular intervals. The moment when a logician knew the colour of band on his forehead, he will leave at the next bell. If anyone leaves at the wrong bell, he will be disqualified.

The master assures the logicians that the puzzle will not be impossible for anyone of them. How will the logicians manage ?

A wooden log balances equally on the scales when weighed with three-quarters of a pound and three-quarters of a wooden log.

Can you calculate the weight of the entire wooden log?

What number divided by 4 is the same as that number minus 4?