The factors of 18 are one, two, three, six, nine and 18. Each number has factors that when multiplied together, add up to equal that number. The number 18 has a total of 6 factors from three different equations: 1x18, 2x9 and 3x6. When trying to find the factor for a particular number, the focus is on searching for whole numbers that are equal to it or of lesser value.Continue Reading
The key to finding all the factors of a number is to know all common multiples available. Every number has at least two factors because one and the number itself can be multiplied to give that number. Occasionally, numbers have only one and that number as factors, and these numbers are called "prime numbers". For example, 17 is a prime number because the only factors for it are one and 17. No other whole number can be used in a multiplication equation to get 17.
When dealing with the factors of two different numbers, the greatest common factor can be found by looking for the highest factor that each number has in common. For example, for 18 and 27, the greatest common factor is 9, as this number can be multiplied, by two and three respectively, to get each answer. The number three is also a factor for both 18 and 27, but it is not the great common factor available.Learn more about Numbers
Digits are symbols in combinations to represent numerals, and numerals represent ideas of numbers. This is similar to how letters are symbols in combination to represent words, and words represent ideas of things. Aside from its primary purpose, digits are also studied in the field of number theory.Full Answer >
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 everything to the right of the second number. If the number in the third decimal place is any number from five to nine, round the number in the second decimal place up by one, and delete all the numbers after it.Full Answer >
Four million, eight hundred sixty-eight thousand two is written as 4,868,002 in numeric or standard form. In converting a number expressed in words to numerals, it is important to write each digit in its proper place. The given number does not have values for the hundreds and tens places; thus, zeros are written in those spaces.Full Answer >
Two fun facts about the number two are that it is the only even prime number and its root is an irrational number. All numbers that can only be divided by themselves and by 1 are classified as prime.Full Answer >