I possess a head

I flaunt a tail

But I don't have mouth or legs

Can you find out who I am?

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 nine thousand, nine hundred nine dollars is written as $9,909,
how should twelve thousand, twelve hundred twelve dollars be written?

As you can see that fifteen matches have been used to form an arrangement. What you have to do is remove any six of them to make them ten.

Find The Next Number in the series:

12 13 15 17 111 113 117 119 123 ?

What is next number in the pattern below:

131 517 192 123 ?

There is one thing that goes round the house and also inside the house but never even share a brief touch. What is it?

What runs around the whole yard without moving?

John drives to his office at 20km/hr. After reaching the office, he realizes that today is a holiday. He went back at an average speed of 30km/hr. Discounting the time spent in the stoppage what was the average speed of his journey?

There are three boxes which are labeled as Rs100, Rs150, and Rs200. One box contains two notes of Rs. 50. The second box contains one note of Rs50 and one note of Rs100 The third box contains two Rs. 100 notes. All boxes are labeled incorrectly.

What is the minimum number of boxes you must check in order to label all boxes correctly?