Sherlock Holmes was challenged to make a pre-drawn line smaller without erasing it. He did it in fractions of seconds. How?

A boy purchased a book from a bookkeeper and gave him $100.
The cost of the book is $50 but the bookkeeper has no change, so he gets the change from the next shop and returns the boy his $50.

After some time the next shopkeeper came with the $100 note and told the bookkeeper that the note was a fraud, so he took the money back.

How much loss did the bookkeeper face?

A man was telling some of his war stories to his grandchildren.
"When the World War I was on the verge of end, I was awarded for my bravery for I had saved a group of my men." He coughed and then added, "When we were fighting in northern France, an enemy soldier threw a grenade at us. Before it could explode, I picked it up and threw it away. For my act of bravery, right before the war ended, A General gave me a sword engraved with the words "Awarded for Display of Bravery and Heroism in World War 1"."

Hearing this, one of the grandson spoke up. "Grandpa, this is not a true story. It can"t be true!"

The truth is that it was not. How did the grand children know it?

The square root of number 121 is "11". What is the square root of the number "12345678987654321."?

Can you identify the direction in which this bus is moving; left or right?

Hint: The bus is moving on the roads of London.

What word begins and ends with an E, but has only one letter?

Identify Me

Hint1: I am a god
Hint 2: I am a planet
Hint 3: measurer of heat

Rearrange the letters in "new door" to make one word.

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

In the four images below, can you find the odd one out?