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Integers
Positive and negative whole numbers, and zero. NOT fractions or decimals

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!

Rational Numbers
 rationale Zahlen
 e.g. (1/3); 2; 3 ...
 (not: e, pi, square 2)

Irrational Numbers
 Not rational!
 Does not repeat, has no end.
 e.g.: e, pi, square(2)

Real Numbers
All numbers, except imaginary numbers

Imaginarz Numbers
e.g.: square(1)

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,...

Distinct Numbers
Numbers that are different from each other





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!!!


Positive Difference
smaller  bigger number.




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.

Factors
 Factors of an integer, are all the integers that can divide the integer.
 factors are smaller then the number itself


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, ...

