What goes up but never comes down?

I have two coins.
* One of the coins is a faulty coin having a tail on both sides of it.
* The other coin is a perfect coin (heads on side and tail on other).

I blindfold myself and pick a coin and put the coin on the table. The face of the coin towards the sky is the tail.

What is the probability that another side is also tail?

A certain street contains 100 buildings. They are numbered from 1 to 100. How many 9's are used in these numbers?

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

I am weightless, but you can see me. Put me in a bucket, and I'll make it lighter. What am I?

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

What does below Rebus mean ?

esgg sgeg gegs gsge

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

When monkey rotate the gear, which mark will be hit 1 or 2 ?

Manish has to secure 40% marks to pass his B.tech final exams.
He got just 40 marks and failed by 40-marks.

What is the maximum marks?