what is the units digit of ( 6 ! * 4 ! + 6 ! * 5 ! ) / 6 ?
( 6 ! * 4 ! + 6 ! * 5 ! ) / 6 = 6 ! ( 4 ! + 5 ! ) / 6 = 720 ( 24 + 120 ) / 6 = ( 720 * 144 ) / 6 = 720 * 24 units digit of the above product will be equal to 0 answer b
divide(add(multiply(factorial(6), factorial(4)), multiply(factorial(6), factorial(5))), 6)