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No. 81=9*9=3*27=1*81
81 has 5 factors and is a square number.
36=6*6=3*12=1*36=2*18=4*9
36 has 9 factors and is a square number.
This doesn't mean that no square numbers have exactly 3 factors though, because:
9=3*3=1*9
9 has 3 factors and is a square number.
4=2*2=1*4
4 has 3 factors and is a square number.
All square numbers have an odd number of factors though (because they have a whole number which multiplies by itself to get the number).
Factors are whole numbers only, and not decimals.
Hope this helps :)
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Are all square roots of even numbers rational?
No. The square roots 8 are irrational, as are the square roots of most even numbers.
What are all the factors between 50 and 60?
All of the numbers between 50 and 60 can be factors. If you're asking for the prime numbers, that's 53 and 59. If you're asking us to factor all the numbers between 50 and 60, then no.
Is the square root of 81 rational?
Yes. The square root of 81 is 9 - a natural number and all natural numbers are rational numbers.
What two whole numbers are closest to the square root of 19?
4x4=16, and 5x5=25, so 4 and 5 are the whole numbers closest to the square root of 19. [And incidentally of all the square roots of all the whole numbers between 16 and 25.]
What are non-perfect square numbers?
Non-perfect square numbers are numbers that are not formed from the square of a number. 12, 13, 14, 21, 99, etc, are all non-perfect square numbers because when you square root them you do not get a whole number, which means they are not formed by any whole number, x, being squared (x^2).
