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# Numbers ok1296542354

## by Navin Joshi, Education at Entranceisolutions on Apr 07, 2011

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IITJEE

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## Numbers ok1296542354Presentation Transcript

• Numbers
• Perfect Square
• Squares of whole numbers
• Square root
• One of two equal factors of a number. If a squared equals b then a is the square root of b . The square root of 144 is 12 because 12 squared is 144.
• The sign used to represent a nonnegative square root.
• Principle Square Root
• A nonnegative square root
• Irrational Number
• Numbers that cannot be expressed as a/b.
• Real Number
• Irrational numbers together with rational numbers to form the set of all numbers.
• Natural Numbers
• 1, 2, 3, 4...
• Whole Numbers
• 0, 1, 2, 3, 4, 5...
• Integers
• The whole numbers and their opposites.
• ...-3, -2, -1, 0, 1, 2, 3...
• Rational Numbers
• Any number that can be expressed in the form a/b where a and b are integers and b is not equal to 0.