What Adam and Eve do not have but the rest of the people have?

Solve the equation by replacing the alphabet with numbers.

MOM + MOM + NO = BOOK=

John was working on a Chemical Mixture whose weight comprise 90% liquid and 10% solid. The total weight of the mixture is 20 pounds. After a while, John noticed that some of the liquid evaporated and now the liquid comprises just 50% of the weight.

What is the weight of the chemical mixture now?

Irene killed hundreds of people mercilessly and yet the police were not able to put her behind the bars. Why?

You are provided with a grid (as shown in the picture). Can you fill the squares with numbers 1-8 in a manner that none of the two consecutive numbers are placed next to each other in any direction (vertically, horizontally or diagonally?)

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 ?

Get total of 120 by using five zeros 0,0,0,0,0 and any one mathematical operator.
Do you ?

What is the largest number you can write with just 3 digits?

Replace the question mark with the correct number below.

When I get multiplied by any number, the sum of the figures in the product is always me. What am I?