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# GMAT Prep - Math

### Number Properties

Odd + or - Odd = Even (ex: 5+5 = 10; 7-5 = 2)
Even + or - Even = Even (ex: 6-2 = 4; 8+6 = 14)
Odd + or - Even = Odd (ex: 7 - 2 = 5; 10+3 = 13)
Odd X Odd = Odd (ex: 3 X 3 = 9; 5 X 5 = 25)
Even X Even = Even (ex: 2 X 2 = 4; 4 X 4 = 16)
Odd X Even = Even (ex: 5 X 2 = 10; 6 X 3 = 18)
For example, 9 is divisible by 3. In this example, the factor is ____. 3
For example, 9 is divisible by 3. In this example, the multiple is ___. 9
An integer is divisible by 2 if its last digit is divisible by _____. 2(ex: 50/2 or 24/2)
An integer is divisible by 3 if its digits adds up to a multiple of ___. 3 (ex: 33/3; 36/3)
An integer is divisible by 4 if its last two digits are a multiple of _____. 4 (ex: 124/4, 164/4)
An integer is divisible by 5 if its last digit is ________ 0 or 5
An integer is divisible by 6 if it is divisible by _________. 2 or 3 (ex: 18 (3*6, 9*2)
An integer is divisible by 9 if its digits add up to the multiple of _____. 9 (ex: 324, 666, 297)
Created by: U0105006