Question

'a' is the smallest odd prime number. If N is smallest two digit number by which a(a^2-1) is divisible, then find the sum of digits of N. ​

Answer 1

Answer:

3

Step-by-step explanation:

a is smallest odd prime number=3

3(9-1)=3×8=24

smallest two digit number that divide 24 is 12....

so sum of digits of 12 is (1+2=3)

so ans is 3