7 x 7=49 so that is the 17th square number
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A number squared means that the number is multiplied by itself.
If a number is to the power of 2 it is "squared". The number that is squared is the "root".
An odd number squared would always equal an odd number and an even number squared would always equal an even
When a number is squared, it has been multiplied by itself. For instance: 4 squared means 4x4, which is equal to 16.
The seventh smallest prime number is 17.