91 - 53 = 38
If that is the only criteria then the lowest number is 456789, what you allready have.
Only one.
7 is a Prime number; its only prime factor is 7.
No. The sum as well as product of two even numbers can only be an even number.
When you add two or more prime numbers you will only end up with a whole number and not a decimal number.
None - its a prime number and can only be times by itself and one.
7 is a prime number; its only prime factor is 7.
To make an even number with those numbers, it has to end in 6 because it's the only even number within the combination. The two possibilities are 576 or 756.
I might be reading this incorrectly, but it seems to me that I can take two prime numbers, 3 and 3, and make the square number nine out of them. This is also true of all the other prime numbers.
No, only square numbers have an odd number of factors.
Numbers with only two factors, the number itself and one, are called prime numbers. Examples of prime numbers are 2 (which is the only even prime number) and 17.
It is a number with two digits in it. So it goes into the "tens" place of the numbers. Basically any whole number from 10 to 99. See how any number between those numbers only has 2 numbers, or digits that make up the number? 9 would only be a single-digit number, and 100 would be a triple-digit number.