The reciprocal of a negative number is also a negative number because when the two numbers are multiplied the answer is 1. For example, the reciprocal of -6 is -1/6, and the product of these two numbers is -6 x (-1/6)= 1... More » Math Numbers

The reciprocal of 3 is the fraction, one third or, in decimal, 0.3 recurring. A reciprocal is essentially a fraction that is inverted or "flipped" and the fraction of 3 is 3 over 1. The reciprocal of 3 over 1 is 1 over 3... More » Math Arithmetic

Reciprocals are two numbers that have one as their product when multiplied with each other. They are most often expressed as proper or improper fractions. More » Math Fractions & Percentages
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The answer to the riddle "From what number can you take half and leave nothing?" is the number 8, because when either the top or bottom half of the digit is removed, the remaining half forms the number zero, or nothing. More » Math Numbers

In reality there is no answer to the question: What is the highest number known to man? With the addition of 1, any number presented as the largest can be made obsolete. In the abstract, numbers stretch on to infinity wi... More » Math Numbers

Some math trivia examples include these facts: The middle digit of a three-digit answer to the multiplication of any number by 11 is the sum of the other two digits, or 21 x 11 = 231, while 2 + 1 = 3. The sum of the digi... More » Math Numbers

Rounding to two decimal places means leaving only two numbers to the right of the decimal point. When the number in the third decimal place is any number between zero and four, round to two decimal places by deleting eve... More » Math Numbers