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The square of a number is the number multiplied by itself. Therefore the square of the number 4 written normally as 42 is = 4*4 = 16. Five more than 42 would therefore be =(4*4)+5 = 21.
-4
25, which is five squared, is the first square number greater than 23.
a pentagonal prism....
No, not always since: if a number is more than 1, then its square root is smaller than the number. if a number is less than 1, then its square root is bigger than the number.