What is the word similar mean in math?

What is 21.9 out of 100 as a percent? How come when you pick any number and multiply it by 2 and add 6 to the answer and take away the number you choose you always get 3 as a answer? How do you know when you divide or times in measuring? What is the pair for leader? What is a prime number between 47 and 59? What is 4625 over 1000 simlified? What is the probability of pulling a queen out of a shuffled card deck? How many times can 145 go 40? What of the pupulation? Two lines always never or sometimes meet in more than one point? How many different seating arrangements are possible with 6 people and 6 chairs? How do you determend probibility? 60 grams is how many teaspoons? How many cubic yards of topsoil do you need for 550 sq ft at 3inches deep? Different ways to say or write 1 quarter? What are three ways a ratio can be written? What does polka mean? What are the best shapes for a shelter? If a sample of 4 different calculators is randomly selected from a group containing 11 that r defective n 30 that have no defects what is the probabilty that atleast 1 of the calculators is defective? What is 94 times 12?