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Consider the following statements: The...

Consider the following statements:
The number 23 is
A. a prime number B. a real number
C.an irrational number D. a rational number of these statements

A

A,B,D are correct

B

A,B,C are correct

C

B,C,D are correct

D

A,C,D are correct

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A
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  4. What is the units digit of the product of all prime numbers between 1 ...

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  5. For what value fo n are 2^(n)-1 and 2^(n)+1 prime?

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  7. Which of the following numbers is divisible by 15?

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  12. If n is any natural number then n^(2)(n^(2)-1) is always divisible

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  14. A 6-digit number is formed by repeating a 3-digit number: for examp...

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