Q:
# 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:
## Is 7 a prime number?

A: Seven is a prime number. A prime number is a positive number that only has two possible divisible numbers. A prime number can only be divided by one and it... Full Answer >Filed Under: -
Q:
## What is bigger than a trillion?

A: The smallest number that is a larger magnitude than a trillion (1012) is a quadrillion, which is equal to 1015. A quadrillion is also known as a billiard b... Full Answer >Filed Under: -
Q:
## Select the next number in the series: 16, 26, 21, 31, __?

A: The next logical number in the series comprised of 16, 26, 21, 31, __ is 26. The difference between 16 and 26 is 10, the difference between 26 and 21 is -5... Full Answer >Filed Under: -
Q:
## How many zeroes are in a zillion?

A: Zillion has an indeterminate number of zeroes. Despite the popular misconception, zillion actually is not a true number. Rather, zillion is defined as an i... Full Answer >Filed Under: