Advertisements
Advertisements
Question
The digits of the prime number 13 can be reversed to get another prime number 31. Find if any such pairs exist upto 100
Advertisements
Solution
The required pairs are
(i) 17 and 71
(ii) 37 and 73
(iii) 79 and 97
APPEARS IN
RELATED QUESTIONS
Express the following number as the sum of twin prime:
120
Show that the following pairs are co-primes:
512, 945
Which of the following is a composite number?
Write seven consecutive composite numbers less than 100 having no prime number between them.
Which of the prime numbers are even numbers?
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.
Express the following as the sum of two odd primes.
44
Which of the following number is prime?
26
Write five pairs of prime numbers less than 20 whose sum is divisible by 5. (Hint : 3 + 7 = 10)
Prime numbers do not have any factors.
