My GMAT Stack
|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
|1. Odd X Odd =
2. Even X Even =
3. Odd X Odd =
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%|