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.
The number you're looking for is.... 19
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.
11
Yes. Being a prime number has nothing to do with the decimal system.
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.
789634........i'm pretty sure the answer is 477560????? i may be wrong
Ten.
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?
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.
the largest 6 digit number is 999999 however following the rules provided, the largest number would be 789643.
3,703,703,670 is an example of a ten digit 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.