I have Rs.50 and I spend it in the way as below.

A man was driving a black truck. His lights were not on. The moon was not out. A lady was crossing the street. How did the man see her?

What is the fewest number of coins that would be required in order to make sure each and every coin touches exactly three other coins?

If you say my name, I will no longer exist. What am I?

Can you count the number of quadrilaterals in the picture below?

Find the next number in the series?
2, 12, 36, 80, 150, 252, 392, _ ?

Spot the cat in the picture below

A word I know,
Six letters contain,
Subtract just one,
And twelve is what remains.

Can you count the number of blocks in the picture below?

In the city of Brain Teasers, 5% of people do not list their phone numbers. Now if we select random 100 people from the phone directory, then how many people selected will have unlisted phone numbers?