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# My GMAT Stack

### Study cards

What are the Properties of 0? Zero is an even integer. Zero is neither positive nor negative. Zero is a multiple of every number. Zero is a factor of no number.
What is the square root of 2? = 1.4
What is the Square root of 3? = 1.7
What is the Area of a Trapezoid? ((sum of bases)(height))/2
Standard Deviations of n Numbers 1. Find arithmetic mean 2. Find differences between mean and each of the n numbers. 3. Square each of the differences. 4. Find avarage of squared differences. 5. Take non-negative square root of this average.
1. Odd + odd = 2. Even + Even = 3. Odd + Even = 1. Even 2. Even 3. Odd
1. Odd X Odd = 2. Even X Even = 3. Odd X Odd = 1. Odd 2. Even 3. Even Any multiplication involving an even number creates an even product.
What is Gross? Is the total amount before any deductions are made.
What is Net? is the amount after deductions are made.
Percentage to know: 1/8% = 12.5%
Percentage to know: 1/6% = 16.6%
Percentage to know: 5/6% = 83.3%
Created by: Brntcolby