Question
Mathematics Question on Prime and Composite Numbers
The numbers 13 and 31 are prime numbers. Both these numbers have same digits 1 and 3. Find such pairs of prime numbers upto 100.
Answer
Pairs of prime numbers that have the same digits, like 13 and 31, are called "permutable primes " or "anagrammatic primes."
Here are some pairs of permutable primes up to 100:
(a) 17 and 71
(b) 37 and 73
(c) 79 and 97