# SAT Math

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1. Integers
Positive and negative whole numbers, and zero. NOT fractions or decimals
2. Prime Number
• An integer that has exactly two distinct factors:
• Itself and 1. All prime numbers are positiv; the smallest prime number is 2.
• One is not a prime!
3. Rational Numbers
• rationale Zahlen
• e.g. (1/3); 2; -3 ...
• (not: e, pi, square 2)
4. Irrational Numbers
• Not rational!
• Does not repeat, has no end.
• e.g.: e, pi, square(2)
5. Real Numbers
All numbers, except imaginary numbers
6. Imaginarz Numbers
e.g.: square(-1)
7. Consecutive Numbers
• The members of a set listed in order, without skipping any.
• Consecutive Numbers: -3, -2, -1, 0, 1, 2...
• Consecutive positive multiples of 3: 3,6,9,12,...
8. Distinct Numbers
Numbers that are different from each other
9. Sum
+
10. Difference
-
11. Product
x
12. Quotient
/
13. Remainder
• The integer left over after dividing, two numbers.
• e.g. 17/2, remainder is 1.
• Remember: on the Math Subject Test, a remainder is ALWAYS an integer!!!
14. Reciprocal
"Kehrwert"
15. Positive Difference
smaller - bigger number.
16. Absolute Value
"Betrag"
17. Arithmetic Mean
average
18. Median
Median
19. Mode
The value that occurs most often in a list. If no value appears more often than all the others in a list, then that has no mode.
20. Factors
• Factors of an integer, are all the integers that can divide the integer.
• factors are smaller then the number itself
21. Prime Factors
• e.g.
• 8= 2*2*2
• 75= 5*5*3
22. Multiples
• The multiples of a number are all the numbers that are evenly divisible by your original number.
• smallest multiple of a is a!
• "postive integer multiples of 6" = 1 x 6, 2 x 6, 3 x 6, ...
 Author: Anonymous ID: 38930 Card Set: SAT Math Updated: 2010-10-01 13:29:09 Tags: SAT Math Folders: Description: to lern for math sat Show Answers: