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प्रश्न
The numbers 13 and 31 are prime numbers. Both these numbers have the same digits 1 and 3. Find such pairs of prime numbers up to 100.
उत्तर
17 and 71,
19 and 91,
37 and 73
79 and 97
There are required pairs of numbers up to 100.
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संबंधित प्रश्न
Write all the prime numbers between:
80 and 100
Find if the following number is a prime number:
63
Express the following number as the sum of two odd prime:
42
Show that the following pairs are co-primes:
161, 192
Show that the following pair is co-prime.
847, 1014
Fill in the blank.
Two perfect numbers are ________ and _______
Write 'T' for true and 'F' for false for the following statement.
Every even number is composite.
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.
Express the following number as the sum of three odd primes:
53
