Take the number 1373
This has an interesting feature
Take each digit,or take two digits at a time in the same order,or 3 digits at a time in the same order or all 4 digits together they are all primes viz
1,3,7,3
13,37,73
137,373
1373 -all are primes
Can you find some more 4 digit numbers like this?
This has an interesting feature
Take each digit,or take two digits at a time in the same order,or 3 digits at a time in the same order or all 4 digits together they are all primes viz
1,3,7,3
13,37,73
137,373
1373 -all are primes
Can you find some more 4 digit numbers like this?
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