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# Is 61 a prime number?

Sixty-one is a prime number. It is the 18th prime number in the series. It is also a centered square number, a centered hexagonal number and a centered decagonal number and the sum of two square numbers.

Continue ReadingPrime numbers are whole numbers larger than 1 that can't be divided by any number other than 1 and itself and still result in a whole number. Prime numbers are always odd, because any even number greater than 2 can be divided by 1, 2 and itself. Similarly, any number ending in 5 can't be prime, because it can be divided by 1, 5 and itself.

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Q:
## What is the square root of 42?

A: The number 42 has two square roots: 6.48 and -6.48, each accurate to two decimal places. The positive root, 6.48, is called the principal square root.... Full Answer >Filed Under: -
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## How many zeros are in a gazillion?

A: The number gazillion does not refer to nor contain a specific number of zeros because it is not an actual number. Gazillion is a descriptive word, not a un... Full Answer >Filed Under: -
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## Why is Avogadro's number important?

A: Avogadro's number, also called Avogadro's law, creates a constant value for different gases, regardless of weight and structure, which makes it a foundatio... Full Answer >Filed Under: -
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## What are "consecutive integers"?

A: Consecutive integers are two integers that sit adjacent to each other in a number sequence. An integer is a positive or negative whole number. The lowest v... Full Answer >Filed Under: