John is the son of Jacob.
So,
Jacob is the_____of John's father?

I am a type of word that is spelt incorrectly or used differently, on purpose for humour. What am I?
Hint 1: You can find me in a joke.
Hint 2: I am a play on words.

Replace the question mark with the correct number in the below-given picture?

You need to remove two matchsticks to make the below equation true. Can you do it ?

What has one eye, but can’t see?

Can you identify the Oscar-winning movie from the rebus below?

What English word has three consecutive double letters?

What's the next in the series?

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

Count the number of squares in the picture below.

My friends called me Iron59 because my parents are a chemist and a mathematician. What is my real name?