289
There can't be a prime number that has a square root because the square root would be a factor of the number.
37
16
16.
The prime number is 47 and 4+7 = 11
A prime number with identical digits is 11.
solution: we know that there are 25 prime numbers are between 1-100 and 168 prime numbers less than 1000. 100 x 100=10000(5 digits) 999 x 999=998001(6 digits) 1000 x 1000=1000000(7 digits) so our answer should be same as the number of prime numbers between 100 to 999. hence, 168-25=143. 143 prime numbers will be there less than 1000 whose square has 5 or 6 digits.
16
83
83
The number 11 is prime and has two identical digits.
3 is found between 2 and 4.