Is 81 a factor of 840?

Here we will show you two different methods you can use to determine if 81 is a factor of 840.

The first method entails simply listing all factors of 840 and then seeing if 81 is one of them. The factors of 840 are 1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 56, 60, 70, 84, 105, 120, 140, 168, 210, 280, 420, and 840. Looking at the list, you see that 81 is not on the list, and the answer to "Is 81 a factor of 840?" is therefore no.

For the second and perhaps easier method, we divide 840 by 81 to see if the quotient is a whole number or fractional number. If the quotient is a whole number, then 81 is a factor of 840. If the quotient is a fractional number, then 81 is not a factor of 840.

840 divided by 81 is 10.37037037 which is a fractional number. Thus, once again, the answer to "Is 81 a factor of 840?" is no.

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