how many even integers from 1 to 100 ( 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 , 64,100 and the corresponding integers are 2 , 4,6 , 8,10 ( more than 4 ) . thus c is the correct answer .
divide(sqrt(100), const_2)