A two digit number has at its ones place. Will it be prime? Justify your answer.
Any two digit number ending with can't be a prime number.
Prime number is defined as a number which is divisible by one and the number itself.
The number ending with is always divisible by , because the divisibility rule states that every number which has or at its unit place is divisible by .
So , two digit number ending with cannot be a prime number.