Question

Can a two-digit number ending with the digit 5 ​​be prime? why ? And a number that ends with a zero? why ?​

Answer 1

Answer:

Can a two-digit number ending with the digit 5 be prime

yes, it can be. eg:- 5

And a number that ends with a zero

Don't forget that the last digit could also be 0, but there are no such prime numbers (since anything ending in 0 is divisible by 10).

Step-by-step explanation:

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Answer 2

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NO, a two-digit number ending with 5 cannot be a prime number. A prime number is a positive integer that is exactly divisible (a zero remainder) by exactly two positive integers: itself and 1. For example, 7 is a prime number because it is a positive integer that is exactly divisible by exactly two positive integers: itself and 1, i.e., 7/7 = 1 and 7/1 = 7; however, no two-digit negative number ending in 5 can be a prime number since a prime number must be a POSITIVE integer, and no two-digit positive number ending in 5 can be a prime number since it is exactly divisible by more than exactly two positive integers; Since it ends with 5, it is exactly divisible by AT LEAST THREE positive integers: itself, 1, and 5; therefore, 15, 25, 35, 45, 55, 65, 75, 85, and 95 are NOT prime numbers.