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If the sum of the digits of a given number is divisible by three, the number is divisible by three.

Q: What is a quick way to determine if 3 is a factor of a number?

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One quick way to tell whether or not a cell is dividing is to look at the number of chromosomes. If the number is doubled then it is dividing.

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There is no quick an easy (and universal) way to do that. You require some experience with solving different types of equations or problems.

There is no quick way to work out if a number is prime or not, the only way is to see if it can be divided by any numbers that aren't itself or one.

Remember that the number has no other factor than one and that number.

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No, 3 is not a factor of 47. A quick way to know that is to add the digits in the number. If they add up to a number that is divisible by 3, the number itself is divisible by 3. If they don't, the number is not divisible by 3.

There is one way to determine weather each binomial is a factor of X-4. The division of polynomials is what determines each binomial.

One quick way to tell whether or not a cell is dividing is to look at the number of chromosomes. If the number is doubled then it is dividing.

Factor them.

just half the number...

A factor is a divisor - a number that will evenly divide into another number. One way to determine the common factors and greatest common factor is to find all the factors of the numbers and compare them. The factors of 3 are 1 and 3. The factors of 4 are 1, 2, and 4. The only common factor is 1.

When a quick, approximate answer meets the needs.

Find the element's period number on the periodic table.

Find the element's period number on the Periodic Table.

A factor is a divisor - a number that will evenly divide into another number. One way to determine the common factors and greatest common factor is to find all the factors of the numbers and compare them. The factors of 10 are 1, 2, 5, and 10. The factors of 169 are 1, 13, and 169 The only common factor is 1, which is also the greatest common factor.

Quick way is to multiply it by 1.22

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