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Q: What are all the whole number factors for 81?

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Factors are just numbers 81 can be divided by. The whole number factors are 1, 3, 9, 27, and 81

1, 3, 9, 27, and 81.

Factors are numbers you can multiply together to get another number. 81: 1, 3, 9, 27, 81

Whole Number : Set of counting numbers along with zero. i.e. W = {0,1,2,3...} Therefore, 81 is a whole number.

81/9 = 9

A number will have an odd number of factors if and only if one of those factors is the square root of the number. This is because any factor of a number you can find must pair up with another factor of that number, and multiply to give the number. The only exception is when the factor would be paired with itself. In other words, be the square root. 81 is a square number, and so the factor 9 (square root of 81) will not pair with any other factor, meaning 81 will have an odd number of factors. 40 has an even number of factors, because it is not a square number, and so all its factors can pair up.

16 and 81 have 5 factors

81 is a composite number because it has more factors than 1 and itself. The factors of 81 are 1, 3, 9, 27, and 81.

16, 81, 256, 625 all have five factors.

There is no whole number - 81/90 in its simplest form is 9/10 !

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 :)

81 is a composite number because it has factors other than 1 and itself. 81 is not a prime number. 81 = 3 * 3 * 3 * 3. Its positive integer factors are: 1, 3, 9, 27, 81.

81 has these five factors: 1 3 9 27 81.

81 is not a prime number. Its positive integer factors are: 1, 3, 9, 27, 81.81 is a Composite Number.

Incorrect. Instead they are factors of I, 3 and 9.

It has more than two distinct factors; they are 1, 3, 9, 27, 81

79 & 81, or any whole number from 1 to 79 with any whole number greater than 81.

The factors of 81 are 1, 3, 9, 27, 81. For them to be common, they need to be compared to another set of factors.

The positive integer factors of 81 are:1, 3, 9, 27, 81

81 is a composite number. Composite numbers are any number that has more than two factors(one and itself). Therefore, since 3,9, and 27 are factors of 81 that makes it a composite number.

All Factors of 81:1, 3, 9, 27, 81

An odd number is a whole number that can not be evenly divided by 2. 81 divided by 2 is 40.5 (which is not a whole number, because of the fraction of a number, .5) therefore, it is an odd number.

No, it does not.

Yes, it is.

Yes. One of the reasons are that if you Google it, they say it's a composite #. Second, a prime number has 2 factors: 1 and itself. But 81 has 5 factors:1, 3, 9, 27, and 81.81 is a composite number 3 * 3 * 3 * 3 = 81