GMAT CHAPTER 9 Flashcards
What are integers?
numbers that can be negative or positive
Also zero but it’s not neg or pos.
EX: 1, 2, 3 -1, -2, -3.
Even x even
Even
Odd x Odd
Odd
Even x Odd
Even
Even + Even
Even
Odd + Odd
Even
Even + Odd
Odd
If two numbers are distinct, they can not be _____
Equal
A number that is only divisible by two numbers (itself and 1).
Prime number
A number is divisible if….
There is no remainder when an integer is divided by another.
If x and y are distinct, then….
They must have different values
Prime number
Is only divisible by
Prime number
Is only divisible by two numbers 1 and itself
A unit is divisible by 3 if…
The sum of its digits are divisible by 3.
Is 216 divisible by 3?
2+1+6 = 9 9 is divisible by 3 so 216 is as well.
An integer is divisible by 4 if…
The last two digits together are divisible by 4 ex. 3,0(28).
Is 10,040 divisible by 4?
40 is divisible by 4 so 10,040 is also divisible by 4
An integer is divisible by 6 if…
It’s divisible by 2 and 3 together. (Factors of 6)
Is 318 divisible by 6?
3+1+8 =12 and divisible by 3 and 2 so divisible by 6.
What is the Least Common Multiple?
The lowest multiple that two numbers have in common.
The highest factor that two numbers have in common is what?
Greatest Common Factor
