what is the units digit of ( 7 ! * 6 ! + 6 ! * 4 ! ) / 2 ?
"( 7 ! * 6 ! + 6 ! * 4 ! ) / 2 = 6 ! ( 7 ! + 4 ! ) / 2 = 240 ( 1680 + 24 ) / 2 = 204480 units digit of the above product will be equal to 0 answer a"
divide(add(multiply(factorial(7), factorial(6)), multiply(factorial(7), factorial(4))), 7)