John went to meet his friend Jacob, but when he was about to reach the main gate, John notices that Jacob had a mighty dog who was fastened to the tree. The chain is long enough that it allows the dog to reach the main gate.

How can the John reach the main gate?

A seven-year-old kid challenged his classmates that he can make the number one disappear by adding something to it.

How can he do that?

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?

Luis Garavito killed Density x Volume.

Who is Luis Garavito ?

Here is what you have to do. You have to throw a ball as hard as you can but it must return back to you even if it does not bounce at anything. Also, you have nothing attached to the ball. There is no one on the other end to catch that ball and throw it back at you.

How will you do it?

Who always enjoys poor health?

What can you deduce from the following BrainBat?

CRY
LMKI

Find a 9-digit number, which you will gradually round off starting with units, then tenth, hundred etc., until you get to the last numeral, which you do not round off. The rounding alternates (up, down, up ...). After rounding off 8 times, the final number is 500000000. The original number is commensurable by 6 and 7, all the numbers from 1 to 9 are used, and after rounding four times the sum of the not rounded numerals equals 24.

Here is a mathematical expression that also secretly tells a movie name. What movie is that?

John left on a horse on Thursday , was gone for two days, and came back on Thursday after completing his work. How did that happen?