Question

17. Which of the following statements are true?
(1) 1 is the smallest prime number.
(11) If a number is prime, it must be odd.
(111) The sum of two prime numbers is always a prime number.
(iv) If two numbers are co-primes, at least one of them must be a prime number.​

Answer 1

Answer:

yes

yes

no

no

this will help you

Answer 2

Answer:

1) False

2) false

3)false

4) False

Step-by-step explanation:

1) 2 is smallest prime number. 1 is neither prime nor composite

2) 2 is a prime number but not odd

3) The Sum of two Prime numbers 5 and 7 is 12 which is not a prime number, it is an composite, even number.

4)     Co Prime Numbers: Two numbers are said to be co-prime numbers only if their common divisor is 1 or highest common factor(HCF) is 1.  

For example, 4 and 9 are co-prime numbers but none of them are prime numbers.

 

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