nine is not a Prime number
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The possibilities for a digit in the ones place of a prime number greater than 5 are 1, 3, 7, and 9. If a 0, 2, 4, 6, or 8 is in the ones place, the number is divisible by 2, so it would not be prime. If a 5 is in the ones place, the number is divisible by 5, so it would not be prime.
19,29,59,79,89 are the prime numbers with 9 in its Unit place.
2.959
write the number 9write some numbers to the left of the 9. These are tens, hundreds, etcput a decimal place to the right of the 9 you wrote in step 1, and write some more numbers to the right of that. these are tenths, hundredths, etc
In the number 19, the face value of 9 is simply 9 itself, as it is the digit at that place. The place value of 9 in this number is 9 multiplied by the place it occupies, which is the units place. Therefore, the place value of 9 in the number 19 is 9.