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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
Write all the prime numbers between:
10 and 40
Write the smallest prime number.
Express the following odd number as the sum of three odd prime number:
35
Express the following number as the sum of twin prime:
144
State the following statement is True or False.
The sum of two prime numbers is always a prime number.
Write 'T' for true and 'F' for false for the following statement.
The sum of two even numbers is always even.
Write 'T' for true and 'F' for false for the following statement.
The HCF of two given numbers is always a factor is their LCM.
Write all the composite numbers between 21 and 50.
Write the smallest and the biggest two digit prime number
The only even prime number is ________________
