Question

I am a number between 1 and 10. I have exactly two factors. I have exactly two multiples that are two-digit ending in 1. What am I?
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Answer 1

Answer:

7

Step-by-step explanation:

7 is a prime numbers with factors 7 and 1 only

2-digit multiples ending with 1 include 21 and 81

21 and 81 are the only 2-digit multiple ending with 1

7 is the answer as it satisfies all the demands for the number.

Answer 2

The are four prime numbers from 1 to 10 . they are 2,3,5 and 7.