Question

Which of the following is a prime number? - 1, 61, 81, 91

Answer 1

Answer:

61,

Step-by-step explanation:

1 is not a prime or composite number and

81=9*9 and 91=7*13,

Answer 2

Answer:

61 is the prime number

Step-by-step explanation:

1 is neither prime nor composite

81 and 91 are composite number

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