Question

3/ The numbers 13 and 31 are prime numbers. Both these numbers have same digits
and 3. Find such pairs of prime numbers upto 100.​

Answer 1

Answer:

prime numbers up to 100 having same digits are:

(i) 13,31 (ii) 17,71 (iii) 37, 73 (vi) 79,97

hence, there are 4 pairs of such type