How can you make number one disappear by adding something to it?

A quarter is one-fourth of a dollar but Mr. John has changed the equation as below :

DOLLAR * 4 = QUARTER

Can you replace each letter with a digit to make the above solution correct?

A man was found murdered on Sunday morning. His wife immediately called the police. The police questioned the wife and staff and got these alibis: The Wife said she was sleeping. The Cook was cooking breakfast. The Gardener was picking vegetables. The Maid was getting the mail. The Butler was cleaning the closet. The police instantly arrested the murderer. Who did it and how did they know?

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

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

A Car driver was heading down a street in Washington. He went right past a stop sign without stopping, he turned left where there was a 'no left turn' sign and he went the wrong way on a one-way street. Then he went on the right side of the road past a cop car. Still, he didn't break any traffic laws. Why not?

What Time Should the last watch show in the below figure?

Which alphabet letter is a question?

Why is the Hole below a Lock?

What's the next in the series?

H, Be, F, S, Mn, Kr, In, Gd, Tl, ?

Why is the longest human nose just 11 inches?