Q:
# What is the next number in the series 13, 18, 16, 21, 19?

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### Quick Answer

**The next number in this sequence is 24.** This would follow the pattern of adding five to a number and then subtracting two. The first three numbers of this sequence indicate this: 13 + 5 = 18 and 18 - 2 = 16.

Recognizing a pattern within a sequence of numbers helps determine numbers that occur much later, often without writing down the entire sequence. Being able to recognize a pattern has additional applications, such as determining probability. There are some number sequences so common, they have a name. One example is the Fibonacci sequence, in which a number is the sum of the two previous numbers before it.

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Q:
## What is the associative property of multiplication?

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Full Answer >**The associative property of multiplication states that the order in which numbers are multiplied in sequence is irrelevant.**In other words, if more than two numbers in an expression are multiplied together, the product is the same no matter the order in which the numbers are multiplied.Filed Under: -
Q:
## How do you find the nth term of a sequence of numbers?

A:In a sequence of numbers, each successive term is usually obtained by adding a certain fixed number to the previous term of the sequence. The equation to calculating the nth term of the sequence is an+b; "a" is the fixed number that is being added to generate the series, and "b" gives the relation between the fixed number and the first number of the sequence.

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Q:
## What is a positive number plus a negative number?

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Full Answer >**The result of a adding a positive number and a negative can either be a negative number or a positive number, depending on the sign of the biggest number.**If the sign of the larger number is negative, then the result is a negative number. However, if the sign of the larger number is positive, then the result is a positive number.Filed Under: -
Q:
## What are the factors of the number 12?

A:The factors of the number 12 are 1, 2, 3, 4, 6, 12, -1, -2, -3, -4, -6 and -12. There are exactly 12 factors of the number 12.

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