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13 terms

Book 1: Chapter 1

GMAT Manhattan Book 1: Number Strategies Chapter 1: Divisibility and Primes
STUDY
PLAY
An integer is divisible by 2
If the integer is even
An integer is divisible by 3
If the sum of the integer's DIGITS is divisible by 3
An integer is divisible by 4
If the integer is divisible by 2 twice
An integer is divisible by 5
If the integer ends in 0 or 5
An integer is divisible by 6
If the integer is divisible by both 2 and 3
An integer is divisible by 8
If the integer is divisible by 2 three times, of if the last three digits are divisible by 8
An integer is divisible by 9
If the sum of the integer's digits is divisible by 9
An integer is divisible by 10
If the integer ends in 10
An integer is always a _________ and __________ of itself.
factor and multiple
Mnemonic for factors and multiples
Fewer Factors and More Multiples
Other ways to say: 3 is a factor of 12; 12 is divisible by 3; or 12 is a multiple of 3
12/3 is an integer; 12/3 yields a remainder of 0; 12 = 3n, where n is an integer; 12 items can be shared among 3 ppl so that wach person has the same number of items
Addition and Subtraction of multiples
If you add or subtract multiples of N, the result is a multiple of N
Factor Foundation Rule
If a is a factor of b, and b is a factor of c, then a is a factor of . AKA any integer is divisible by all of its factors and also by the FACTORS of its factors