how many even integers from 1 to 50 ( both inclusive ) have even number of factors ?
"integers having even number of factors will be perfect squares . even numbers will have even perfect squares . thus , the possible values for the perfect squares are : 4 , 16,36 and the corresponding integers are 2 , 4,6 ( more than 2 ) . thus a is the correct answer ."
divide(sqrt(50), const_2)