Can you fill the blank with the correct number?

6 30 870 756030 _____

You have a three-gallon and a five-gallon measuring device. You wish to measure out four gallons.

Which famous Hollywood movie name is hidden in the below rebus?

John was writing his first book. After saving the document, he locked his laptop with a password and mentioned some phrases for the hint box.

A friend of his tried opening his laptop but found out that it was password protected. Following is the hint that appeared.
1 mobile 3 books 2 roars 1 night 4 balls 2 lighters 1 ghost 1 hat 3 watches.

Can you help him in cracking the password?

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

Can you solve the below algebraic mathematical equation?

(J+O+I+N+T)3 = JOINT

There are three boxes on a table. One of the box contains Gold and the other two are empty. A printed message contains in each box. One of the message is true and the other two are lies.

The first box says "The Gold is not here".

The Second box says "The Gold is not here".

The Third box says "The Gold is in the Second box".

Which box has the Gold?

What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see? What is it?

I have a mouth but I don't eat.
I have a bank but have no money.
I have a bed but i dont sleep.
I wave but have no hands.

Who Am I ?

If two's company, and three's a crowd, then whats four and five ?