Hey student,

Number is 1089

No. of digits in 1089, n => 4 (even)

If n is even :

=> then no. of digits in Square Root =n/2

If n is odd :

=> then no. of digits in Square Root =(n+1)/2

In this case n is even

Therefore, No. of digits in Square root of 1089 = n/2 =4/2 = 2

(Square Root of 1089 is 33)

I hope it helps!