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प्रश्न
Which of the following are co-primes?
विकल्प
91 and 72
34 and 51
21 and 36
15 and 20
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उत्तर
The correct option is 91 and 72.
The H.C.F. of 72 and 91 is 1.
So, they are co-primes.
Option 34 and 51 is not correct because 34 and 51 have 17 as their H.C.F.
Option 21 and 36 is not correct because 21 and 56 have 3 as their H.C.F.
Option 15 and 20 is not correct because 15 and 20 have 5 as their H.C.F.
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संबंधित प्रश्न
Find if the following number is a prime number:
91
Express the following odd number as the sum of three odd prime number:
31
Express the following number as the sum of twin prime:
120
State the following statement is True or False.
The sum of two prime numbers is always a prime number.
Which of the following is a prime number?
Which of the following are co-primes?
Write 'T' for true and 'F' for false for the following statement.
Every even number is composite.
Which of the following number is prime?
26
2 is the only even prime number.
Which of the following is NOT a prime number?
