A number is greater than $25$ and prime. What may be the possible digits at ones place?

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Solution

Prime Numbers:The numbers which have only two factors $1$ and itself are called Prime Numbers.
Lets start writing prime numbers greater than $25$
$29,31,37,41,43,53,59$ and many more
In all these numbers the digits at ones place are either $1,or3,or7,or9$
Hence, the possible digits at ones place in a prime number greater than $25$ are either $1,or3,or7,or9$

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A number is greater than 25 and prime. What may be the possible digits at ones place?

A number is greater than $25$ and prime. What may be the possible digits at ones place?