Which is greater, the greatest whole number with 4 digits or the least whole number with 5 digits?

The answer would be the least whole number with 5 digits. You have to base it on the place values of each digit of a number. As the number of digits increases, the value also increases. For a number with 4 digits, the greatest value would be a multiple of 1,000. For a number with 5 digits, the greatest value would be a multiple of 10,000. Hence, no matter what is the multiple, 10,000 would always be far greater than 1,000.

The surface area would be 576 because you multiply all the numbers then multiply that number by 6