739-is-a-prime-number-and-its-reversed-number-937-is-also-prime-Determine-4-digit-prime-numbers-whose-reversed-be-also-prime-If-number-of-such-primes-is-a-function-of-number-of-digits-determ

Question Number 51507 by Rasheed.Sindhi last updated on 27/Dec/18

^{∙} 739 i s a p r i m e n u m b e r a n d

i t s r e v e r s e d n u m b e r 937 i s a l s o

p r i m e .

D e t e r m i n e 4 - d i g i t p r i m e n u m b e r s

w h o s e r e v e r s e d b e a l s o p r i m e .

^{∙} I f n u m b e r o f s u c h p r i m e s i s a

f u n c t i o n o f n u m b e r o f d i g i t s,

d e t e r m i n e t h a t t h e f u n c t i o n i s

i n c r e a s i n g o r n o t .