what is the largest 4 digit number exactly divisible by 50 ?
"largest 4 digit number = 9999 9999 ÷ 50 = 199 , remainder = 49 hence largest 4 digit number exactly divisible by 50 = 9999 - 49 = 9950 answer : c"
multiply(floor(divide(power(const_10, 4), 50)), 50)