What is the largest number that rounds to 60000?

Answer 1

65000.

Some people, ignorant of bias and its effect, require the digit 5 to be rounded up in all cases. This introduces an upward bias in calculations for the following reason:

0 is not rounded.

The digits 1, 2, 3 and 4 are rounded down

The digits 5, 6, 7, 8 and 9 are rounded up.

In the long term, therefore, there would by fewer incidences of rounding down compared to rounding up. As a simple example, the mean of the first 20 integers, calculated from their rounded values is 11, not 10.5 which is the correct value.

To avoid this bias, 5 MUST be rounded down half the time and up half the time. The conventional way to do this while maintaining reproducibility of calculations is to round 5 so that the last surviving digit is even.

Answer 2

59,999

Answer 3

59,999

Answer 4

60 000