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To be conclusively positive, it works the same for any size number, you have to try to divide it by every number up through its square root.

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15y ago

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What number is a odd prime number and the ones digit is 8 more than its ten digit?

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


What is the prime number between 20 and 30 one digit is 7 greater than its ten digit?

Well, let's see ... If it's between 20 and 30, then its ten digit has to be 2. And if its ten digit is 2, then its one digit has to be 9. So the real question we have to answer is: "Is 29 a prime number ?" The answer is: Yes. So that must be it.


What is the smallest 2-digit prime number?

11


Are prime numbers still prime in non ten digit counting systems?

Yes. Being a prime number has nothing to do with the decimal system.


What is smallest 3-digit prime number converted to decimal?

It is 101. And since the place value of each digit is ten times the place value of the digit to its right, the number is in decimal form.


What is the largest six-digit even number that meets the following the ten-thousands digit is twice the tens digit The hundredthousands digit is a prime number. the thousands digit is divisible by one?

789634........i'm pretty sure the answer is 477560????? i may be wrong


How many 2 digit prime numbers are there whose unit digit is greater its tens digit?

Ten.


What digit is in the ten thousand place?

Oh, dude, the digit in the ten thousand place is, like, the fourth digit from the right in a five-digit number. So, if you have a number like 25,684, the digit in the ten thousand place is 6. But, you know, who really cares about the ten thousand place anyway?


What is the prime number if the sum of ones and tens digit is 10 and tens digit is greater thanones digit?

Assuming that the question refers to 2-digit numbers, the units [ones] digit must be 1 3 7 or 9 otherwise it cannot be prime. Since the two digits add to ten, the number must belong to the set {91, 73, 37, 19} The ten digit is the larger of the two so the number cannot be 37 or 19. So it must belong to the set {91, 73) 91 = 7*13 so is not a prime, whereas 73 is. So the answer is 73.


What's the largest six digit number with no repeated digits whereby the ten thousands digit is twice the tens the hundred thousands digit is a prime number and the thousands are divisible by the units?

the largest 6 digit number is 999999 however following the rules provided, the largest number would be 789643.


What is a 10 digit number?

3,703,703,670 is an example of a ten digit number.


Is 1000000007 a prime number or a composite number?

It is prime. I have suggestion for you. Whenever you wanted to know a number is prime or not, use the calculator of this site: prime-calculator dot com.