What are the smallest and largest whole numbers that round to 600 when rounded to the nearest hundred?

Answer 1

600

Answer 2

The smallest is 550, the largest is 649.

When rounding to the nearest 100, it will be the tens that decides: if it is 50 or above it will round up, otherwise if less than 50 it will round down.

Thus numbers in the range 550 to 649 will all round to 600 to the nearest 100.

(549 would round down to 500 and 650 would round up to 700.)

Answer 3

500