How many two-digit primes have both their digits non-prime?
Answers
Given : two-digit primes having both their digits non-prime
To find : all the numbers
Solution:
Two Digit Prime having both their Digit non prime
non prime Digits
1 , 4 , 6 , 8 , 9
4 , 6 , 8 can not be 2nd Digit
11 , 19
41
61
89
11 , 19 , 41 , 61 & 89 are Two Digit Prime having both their Digit non prime
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Answer :
step-by-step explanation :
To Find : Two-digit primes have both their digits non-prime.
Solution:
Firstly,
The non- prime digits : 1 , 4 , 6 ,8 ,9
And, we know 2 is only Even prime number, So
{ 4 , 6 , 8 } can't be at ones place of two digit number .
Thus, { 11 , 19 , 41 , 61 , 89 } is only the two digit number having both their non-prime.
