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What are the factors of 9 and 81?
The factors of 9 are: 1, 3, 9 The factors of 36 are: 1, 2, 3, 4, 6, 9, 12, 18, 36 The factors of 81 are: 1, 3, 9, 27, 81
What factors of 20 are also square numbers?
25, 49, 81 To satisfy your criterion, you need the square of an odd number.
What are the 5 factors in 81?
Factors are just numbers 81 can be divided by. The whole number factors are 1, 3, 9, 27, and 81
What are 81's common factors?
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.
What are the factors and prime factors tree of 81?
1, 3, 9, 27, 81 81 27,3 9,3,3 3,3,3,3
Why 81 have an odd number of factors and 40 have an even number of factors?
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.
Why is 81 an composite number?
Because it has more than two factors and it is also a square number in which 9 times 9 = 81
What are the factors of 9 and 81?
The factors of 9 are: 1, 3, 9 The factors of 36 are: 1, 2, 3, 4, 6, 9, 12, 18, 36 The factors of 81 are: 1, 3, 9, 27, 81
How do you factor 81 16k2?
If that's 81 - 16k2, it factors neatly as the difference of squares into (9 - 4k)(9 + 4k)If that's 81 + 16k2, it factors to (4k -9i)(4k + 9i) where i is the square root of negative one.
Do all square numbers have exactly 3 factors?
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 :)
What are the factors of 18 and 81?
The factors of 18 are 1,2,3,6,9, and 18. The factors of 81 are 1,3,9,27, and 81.
What 4 numbers can make 81?
39,39,1,1 (: If you mean multiplication, 1, 3, 9, 27, 81 are all factors of 81.
What 2 square numbers make 106?
25 and 81
What are factors for 81?
The factors of 81 are: 1 3 9 27 81
What are the factors or 81?
The factors of 81 are 1, 3, 9, 27, and 81.
Is 81 a perfect square?
81 is a perfect square
What are th factors for 81?
The factors of 81 are 1, 3, 9, 27, and 81.
