Considering the below equation:

V + II - VI = 10
IV - X + VIII = 20
IV - VII + VI = 30

Then, I + II + III = ?

Can you name an animal whose killing cannot be performed without spilling your own blood?

I am an odd number. Take away a letter and I become even. What number am I?

A word I know,
Six letters contain,
Subtract just one,
And twelve is what remains.

A spy was in Canada trying to steal insider information on how to set up new Maple Syrup factories in their country. He was introduced to the operations manager of the biggest factory in Canada. However, the manager was suspicious and decided to test him with a question before he trusted him. So he asked, “What would you be sure to find in the middle of Toronto?” The spy thought fast and came up with an answer for the manager. What was his answer?

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

Can you find the missing piece of the Porsche?

You have two buckets of 11 liters and 6 litres.
How can you measure exactly 8 litres?

Using Only Five 5's and any mathematical operator make sum as 37

A boy and his father are caught in a traffic accident, and the father dies. Immediately the boy is rushed to a hospital, suffering from injuries. But the attending surgeon at the hospital, upon seeing the boy, says 'I cannot operate. This boy is my son.' How is this situation explained?