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

A pond had 60 fish, out of which, all but 20 died.
How many fishes are now present in that pond?

Find the missing letter in the last circle logically in the given below picture.

I am the black child of a white father, a wingless bird, flying even to the clouds of heaven. I give birth to tears of mourning in pupils that meet me, even though there is no cause for grief, and at once on my birth, I am dissolved into air. What am I?

One day, I thought of ways that can be used for creating a palindrome. So I decided that I will turn into a larger number by adding the reversed digits to the original number and keep doing it till I finally obtained a palindrome.

I am not sure if this process will always result in a palindrome eventually but I was able to produce a four-digit palindrome. Can you guess my starting number?

Which is heavier: a ton of bricks or a ton of feathers?

Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?

O_er_t_o_

Complete the missing letters of the given word.

A maths symbol is hidden in the below Bar Graph. Can you decipher it?

I’m light as a feather, yet the strongest person can’t hold me for five minutes. What am I?