Front
Arithmetic: Even/Odd Addition Rules
Back
E+E=E; O+O=E; E+O=O
Adding two of the same parity results in an even number.
Public Deck
GMAT Quantitative - 50 Key Concepts
Prepare for the GMAT Quant section with 50 flashcards covering arithmetic, algebra, geometry, and data sufficiency.
AnyFlashcards50 cards
Preview
Front
Arithmetic: Even/Odd Multiplication Rules
Back
E×E=E; E×O=E; O×O=O
If at least one factor is even, the product is even.
Front
Arithmetic: Definition of Prime Numbers
Back
Integers > 1 with exactly two factors (1 and itself)
2 is the only even prime; 1 is not prime.
Front
Arithmetic: Divisibility Rule for 3
Back
Sum of digits is divisible by 3
Example: 123 (1+2+3=6) is divisible by 3.
Front
Arithmetic: Divisibility Rule for 4
Back
Last two digits are divisible by 4
Example: 1,524 is divisible by 4 because 24 is.
Front
Arithmetic: Divisibility Rule for 9
Back
Sum of digits is divisible by 9
Example: 729 (7+2+9=18) is divisible by 9.
Front
Arithmetic: Greatest Common Factor (GCF) vs. Least Common Multiple (LCM)
Back
GCF: Largest shared factor; LCM: Smallest shared multiple
GCF(12,18)=6; LCM(12,18)=36.
Front
Arithmetic: Remainder Theorem Basics
Back
Dividend = (Divisor × Quotient) + Remainder
If 17 is divided by 5, 17 = (5 × 3) + 2.
Front
Arithmetic: Factorial of 0 and 1
Back
0! = 1 and 1! = 1
Used frequently in permutations and combinations.
Front
Arithmetic: Absolute Value Property |x - y|
Back
The distance between x and y on a number line
|x - 3| = 5 means x is 5 units away from 3.
+ 40 more cards
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