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प्रश्न
Which of the following are co-primes?
विकल्प
39, 91
161, 192
385, 462
none of these
उत्तर
161 and 192
39 and 91 are not co-primes as 39 and 91 have a common factor, i.e. 13.
161 and 192 are co-primes as 161 and 192 have no common factor other than 1.
385 and 462 are not co-primes as 385 and 462 have common factors 7 and 11.
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संबंधित प्रश्न
Write all the prime numbers between:
40 and 80
Make a list of seven consecutive numbers, none of which is prime.
Find if the following number is a prime number:
91
Express the following number as the sum of twin prime:
84
Which of the following is a prime number?
Fill in the blank.
The HCF of two consecutive odd numbers is _________
Fill in the blank.
Two perfect numbers are ________ and _______
Write 'T' for true and 'F' for false for the following statement.
Every prime number is odd.
Express the following number as the sum of three odd primes:
53
Prime numbers do not have any factors.
