The factors of 84 are (-1), (-2), (-3), (-4), (-6), (-7), (-12), (-14), (-21), (-28), (-42), (-84), 1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 42 and 84. To find the factors of a number, mathematicians find all of the possible number combinations that can be multiplied to give the number.
Using divisibility rules can help someone quickly find the factors of a number. All of the even numbers are always divisible by 2. If the digits that make up a number can be added to make a number that can be evenly divided by 3, the number itself is divisible by 3. All numbers that end in a 0 or a 5 are always divisible by 5.
Learn MoreIn mathematics, a factor of a base number is any number that can be evenly divided into the base number. Due to this definition, a factor can only be less or equal to the original base number. Although all whole numbers can be divided evenly by one, it is still considered a factor.
Full Answer >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 digits of the result of multiplying a number by 9 is always 9; 2 x 9 = 18, while 1 + 8 = 9.
Full Answer >A mathematical phrase is a set of words or a combination of words and numbers that can be written as a mathematical expression. An expression is a mathematical phrase that combines numbers and/or variables using mathematical operations. Expressions represent a value. Examples include variables and/or numerals appearing alone or in combination with operators.
Full Answer >A direct formula is a formula that represents the proportionate change of two variables in the same direction such that when one variable increases/decreases the other variable also increases/decreases. The direct variation formula is a direct formula that maps two variables using a constant of variation.
Full Answer >