There are nine dots in the picture that has been attached with this question. Can you join all the dots by drawing four straight lines without picking up your pen?

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

Using eight eights and addition only, can you make 1000?

In the picture given below, can you find out which digit will take place of the question mark?

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?

Can you place six matchsticks in a manner that each of the matchsticks is in touch with the other five matchsticks?

What is so fragile that saying its name breaks it?

Which number comes next in the number series?

2, 9, 30, 93, ?

What is more useful when it is broken?

A quarter is one-fourth of a dollar but Mr. John has changed the equation as below :

DOLLAR * 4 = QUARTER

Can you replace each letter with a digit to make the above solution correct?