What is a lower benchmark?

Is there a Roman numeral for infinity? What is 6.20 as a decimal? How you know the number of decimal places that should be in the product when you multiply two decimal number together? How many combinations can you get from a 3 digit code from 1 to 3? Two US coins are worth a total of 0.30 and one of them is not a nickel. What are the coins? What is the scientidic notation of 4000? What is the largest whole number to the left of 3.52? How many numbers between 16 to 189 are divisible by 9 but not by 4? What fraction is equivalent to 5 20ths? Why is MI 6 director called M? When do you use bearing in maths? Is 310 a prime number or a composite number? What are some ways to to remember subtracting real numbers? How many times does Power occur in the Old Testament? What is 115 divied by 6? What is the rule for multiplying integers with same signs? How many 5-digit passwords can be made from the seven letters ABCDEFG if any letter occurs at most twice? How many 3 digit even numbers are there? What number is 6.1 of 60? How much does a teenager spend on makeup a year?