MATH TIDBITS FOR GRE TWO

Card Set Information

 Author: shockwave ID: 271220 Filename: MATH TIDBITS FOR GRE TWO Updated: 2014-04-20 14:00:01 Tags: MATH TIDBITS GRE TWO Folders: MATH TIDBITS FOR GRE TWO Description: MATH TIDBITS FOR GRE TWO Show Answers:

Home > Flashcards > Print Preview

The flashcards below were created by user shockwave on FreezingBlue Flashcards. What would you like to do?

1. every rational number can be expressed as a terminating or repeating decimal, BUT WHAT IF ITS SOMETHING LIKE THIS:
0.010110111011110111110. . .
THEN ITS IRRATIONAL. IT GOES ON INDEFINITELY.

THEY DO NOT TERMINATE (10/2=5) OR REPEAT (1/3 = .33333 WITH A BAR OVER THE LAST 3).
2. WHAT IS THE CLASSIFICATION OF NUMBERS.
• NATURAL
• WHOLE
• INTEGERS
• RATIONAL
3. √(9) is a ________ number.

It is because √(9) = 3
• Notice that √(9) is a natural number.
• It is because √(9) = 3
4. DEFINE:
All integers are fractions.
Not all fractions are integers.
• Example: -2 is an integer and can be written as -2/1 to make it a fraction.
• However, -1/3 = -0.333333333 is not an integer, ITS A RATIONAL NUMBER.
5. Irrational numbers are numbers that cannot be written as a ___________.
Irrational numbers are numbers that cannot be written as a fraction.

Another way to see them is that they are neither repeating decimals nor terminating decimals.

• Examples:
• pi= 3.14...,
• 2.224879566117426874,
• √(7)
6. 2<x<3
THIS IS KNOWN AS WHAT AND WHAT IS THE X CALLED?
DOUBLE INEQUALITY.

THE X IS KNOWN AS THE INTERVAL. THERE ARE 4 TYPES DEPENDENT UPON IF THE END NUMBERS ARE COUNTED IN THE EQUALITY OR NOT.

• X<4
• X>4
• X≤4
• X≥4
7. DEFINE triangle inequality.
If a is positive and b is negative, then ab is negative.
8. Be careful not to confuse 0.01 with 0.01%.
The percent symbol matters!

0.01 = _____%
0.01% = ______
0.01 = 1%

0.01% = 0.01/100 = 0.0001