What English word has three consecutive double letters?

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?

You Throw The Outside, Cook The Inside
Eat The Outside, Throw The Inside.

What Is It?

My friends called me Iron59 because my parents are a chemist and a mathematician. What is my real name?

What is the last thing you take off before bed?

What comes
Once in a Year
Twice in a Month
4 times in a Week
6 times in a Day

A bag contains 64 balls of eight different colours. There are eight of each colour (including red). What is the least number you would have to pick, without looking, to be sure of selecting 3 red balls?

You have two buckets - one holds exactly 5 gallons and the other 3 gallons. How can you measure 4 gallons of water into the 5 gallon bucket?

(Assume you have an unlimited supply of water and that there are no measurement markings of any kind on the buckets.)

Rectify the following equality 101 - 102 = 1 by moving just one digit.

You are playing as white and given four rooks to checkmate the black king in four moves with the following rules 1. You can place one rook every move and ensure the black king should be in check position.2. After four moves the black king should be in the checkmate position.