## Number Properties

##### Created by:

nixon09  on October 6, 2010

##### Description:

Number properties, even and odd properties, divisibility, and prime numbers

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# Number Properties

 Properties of numbers between -1 and 1 #1The reciprocal of a number between 0 and 1 is greater than the number
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#### Definitions

Properties of numbers between -1 and 1 #1 The reciprocal of a number between 0 and 1 is greater than the number
Properties of numbers between -1 and 1 #2 The reciprocal of a number between -1 and 0 is less than the number
Properties of numbers between -1 and 1 #4 The square of a number between 0 and 1 is less than the number
Properties of numbers between -1 and 1 #5 Multiplying and positive number by a fraction between 0 and 1 gives a product smaller than the original number
Properties of numbers between -1 and 1 #6 Multiplying any negative number by a fraction between 0 and 1 give a product greater than the original number
Subtraction - two negative numbers minus each other (-5) - (-10) = (-5) + (+10) = +5
Odd + Odd Even
Even + Even Even
Odd + Even Odd
Odd x Odd Odd
Even x Even Even
Odd x Even Even
The greatest common factor, or greatest common divisor is The largest factor shared by the two number
Divisible by 2 if the last digit is divisible by 2
Divisible by 3 if the sum of its digits is divisible by 3
Divisible by 4 if its last two digits are divisible by 4
Divisible by 5 if its last digit is 0 or 5
Divisible by 6 if it divisible by both 2 and 3
2 - last digit is divisible by 2
3 - sum of its digits is divisible by 3
Divisible by 9 if the sum of its digits is divisible by 9
Prime Numbers 1 - 5 2 3 5 7 11
Prime Numbers 6-10 13 17 19 23 29
Prime Numbers 11-15 31 37 41 43 47
Prime Numbers 16 - 20 53 59 61 67 71
Prime Numbers 21 - 25 73 79 83 89 97
Prime Numbers 26 - 30 101 103 107 109 113

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