Eight of us go fourth, not back, to protect our king from an attack. What are we?

Forwards I am heavy, backward I am not. What am I?

Find the 8 in the below-given Image.

If eleven plus two equals one, what does nine plus five equal?

Two natural numbers have a sum of less than 100 and are greater than one.

John knows the product of the numbers and Jacob knows the sum of numbers.

The following conversation takes place between them:
John: 'I am not aware of those numbers.'
Jacob: 'I knew you wouldn't be. I am not aware myself.'
John: 'Now I know them!'
Jacob: 'Now I know them, too!'

What are the two numbers?

You board a train. The train will have to enter a tunnel soon. You are claustrophobic. Which place is the best for you to sit?

Spelt forwards I’m what you do every day, spelled backwards I’m something you hate. What am I?

Find the last number in the series below:

voN luJ yaM raM ---

How can you take 2 from 5 and leave 4?

What is the four-digit number in which the first digit is one-third the second, the third is the sum of the first two, and the last is three times the second?