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SETS - Coggle Diagram
SETS
SET OF NUMBERS
Natural Numbers: N= {0,1,2,3,4........................}
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Z ...., 3, 2, 1,0,1,2,3,...
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Rational Numbers
A number that can be written as a ratio of two integers is called a rational
number (division by zero is excluded).
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Irrational Numbers
A number that cannot be expressed as b
called irrational number. It is
denoted by An example of an irrational number is
2
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Real Numbers
So far, we have talked about rational numbers (including integers) and irrational
numbers.
DIVISIBILITY
Given any two natural numbers a and b with b≠0, if there is a natural number c satisfying“b c = a”then we say that a is divisible by b, or b divides a. In symbols, we write b|a (read b divides a). If a is
not divisible by b, we write
b a.
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