what percentage of numbers from 1 to 95 have squares that end in the digit 0 ?
clearly , the numbers which have 1 or 9 in the unit ' s digit , have squares that end in the digit 1 . such numbers from 1 to 95 are 10 , 20,30 , 40,50 , 60,70 , 80,90 . number of such numbers = 14 . required percentage = ( 9 / 95 * 100 ) = 9.47 % answer : c
multiply(divide(floor(divide(95, const_10)), 95), const_100)