Additional Rule* If the
digit to be dropped is 5 and is followed by zeros, drop the 5 and
rule is strictly applied if you are doing round off of statistical data
as it prevents consistent rounding up of the data. For this course, this
rule is not strictly enforced.
(i) keep the last digit as is if the digit before the '5' is even, or
(ii) increase the last digit by 1 if the digit before the '5' is odd