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Q: What is the prime number between 70 and 100 if the ones digit is 1 more than the tens digit?

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43

Everything that has 0 as its digit can be divided by both 2, and 5 as well as many more. Therefore it cannot be a prime number.

The number you're looking for is.... 19

The number 50 is composite. Any two-digit (or more-digit) number that ends in zero can be divided evenly by 10 (and 5 and 2, for that matter). That means no two- or more-digit number ending in 0 can be prime.

6849 and 0213

31

An on-line prime number chart ended at 10007. There are many more charts available for download. So the answer is that there are many five digit prime numbers.

No because a prime number has only two factors which are itself and one as for example 19 is a prime number but 18 is a composite number because it has more than two factors.

A double digit number, triple digit number........

87 is the only 2-digit number that is 6 greater and 13 less than a square, but it is not prime.

I'm sure there are more than 2 prime numbers that are 400 digits long.

It is 3823.

That refers to a number that has more than one digit.

That means that the number has more than one digit.

Using prime factorization, there are 2 three digit numbers with 9 factors: 512 and 768. There are no three digit numbers with 10 or more prime factors. 512=2^9 and 768=3*2^8

We call them by the number of their digits. Two-digit number, three-digit number and so on.

The number is 84.

Prime numbers have two factors. Composite numbers have more than two.

A prime number is a number with two and only two factors: 1 (also known as unity) and itself. A composite number is a number with more than two factors; in other words, it has at least one factor besides 1 and itself. 105 has factors other than 1 and itself, so it is not a prime number. For example, it is divisible by 5. (You can tell this because the last digit is a 5. If the last digit - the digit in the ones place - is a 5 or a 0, the number is divisible by 5.) Therefore, 105 is a composite number.

A prime number is a number with two and only two factors: 1 (also known as unity) and itself. A composite number is a number with more than two factors; in other words, it has at least one factor besides 1 and itself. 360 has factors other than 1 and itself, so it is not a prime number. For example, it is divisible by 5. (You can tell this because the last digit is a 0. If the last digit - the digit in the ones place - is a 5 or a 0, the number is divisible by 5.) Therefore, 360 is a composite number.

194

multi-digit

194.There were actually two options, 194 and 083, but as it needs to be a three digit number, 194 is more fitting.

They are frequently used interchangeably, but to be precise, a digit is any of the numerals from 0 to 9, esp. when forming part of a number. A number can have one or more than one digit.

10,003