What goes up but never comes down?

Solve the equation by replacing the alphabet with numbers.

MOM + MOM + NO = BOOK=

Considering the below equation:

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

Then, I + II + III = ?

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

The pound is not a finish.

We are sharing a few instructions below, which you have to use in any suitable order to modify the above sentence such that the end sentence is a scientific fact.

- Eliminate a letter and supplement another in its place.
- Take away one word.
- Remove one letter from one word.
- Get rid of two letters from one word.
- Swap a word with its antonym.

Find the smallest sentence with all the English alphabet.

The sum of a mother, her baby and her dog's weight is 170 Kg. How much does the baby weigh if the mother weighs 100 kg more than the combined weight of the baby and the dog, and the dog weighs 60 per cent less than the baby?

I am looking for a word that change both gender and number when i add the letter 'S'.

What Word am I Looking For ?

It is raining today at 11:59 am. What is the probability of sunny weather after 72 hours?

A mother is 21 years older than her child. In exactly 6 years from now, the mother will be exactly 5 times as old as the child.
Where's the father?