Difference between revisions of "Perfect cube"
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| − | A '''perfect cube''' is an [[integer]] that is equal to some other integer raised to the third power. We refer to raising a [[number]] to the third power as | + | A '''perfect cube''' is an [[integer]] that is equal to some other integer raised to the third power. We refer to raising a [[number]] to the third power as ''cubing'' the number. |
| + | For example, 125 is a perfect cube because <math>5^3 = 125</math>. However, 121 is not a perfect cube because there is no integer <math>n</math> such that <math>n^3 = 121</math>. | ||
== Example Problems == | == Example Problems == | ||
=== Introductory Problems === | === Introductory Problems === | ||
* [[2005_AMC_10A_Problems/Problem_15 | 2005 AMC 10A Problem 15]] | * [[2005_AMC_10A_Problems/Problem_15 | 2005 AMC 10A Problem 15]] | ||
| − | + | * [[2018_AMC_8_Problems/Problem_25 | 2018 AMC 8 Problem 25]] | |
== See also == | == See also == | ||
Revision as of 20:50, 11 December 2018
A perfect cube is an integer that is equal to some other integer raised to the third power. We refer to raising a number to the third power as cubing the number.
For example, 125 is a perfect cube because 
. However, 121 is not a perfect cube because there is no integer 
such that 
.
