Which is faster, Heat or Cold ? Explain.

I start and end with 500 and carry a 5 in my heart. But I require the first letter and the first number to be complete. I am the name of a King.

Who am I ?

What will be the best approach to finding all the prime numbers less than 75 that leave an odd reminder when we divide them with 5?

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

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

Whats the next number in the below number sequence pattern.

Look at the picture and find out which square is not linked with any of the other squares.

A pack of cards has 40 cards. You are blindfolded. Out of 40, 25 cards are facing down while 15 are facing up. You have been asked to divide this pack of cards into two decks - so that each deck contains an equal number of face-up cards. Remember, you are blindfolded.

How will you do it?

Can you find the ages of a son, father and grandfather based on the following facts?
The sum of the ages of grandfather, father and son is 140 years.
The age of the son in months is the same as the grandfather in years.
The age of the son in days is the same as the father in weeks.

John was drowned by he was not wet. How?

Can you count the number of seconds in a year?

Clue: You need to bother about calculation.