Okay... I know this upper bound thing. BUT, how to convince the student into accepting it?Pand wrote: ↑Thu Mar 28, 2019 5:04 pmSorry, unfortunately, your answer is wrong. I am a math teacher and am aware of the confusion this question causes to people not familiar with bounds.The Math Note wrote: ↑Thu Mar 28, 2019 11:05 am0.034 rounded off to the nearest 0.01 is 0.03

0.025 rounded off to the nearest 0.01 is also 0.03

So anything between 0.025 and 0.034 rounded off to the nearest 0.01 is 0.03.

Hope that helps.

The cambridge solution to a similar question in the o level is same as mine. Unfortunately, only teachers have access to the report.

As in, some of the students can be quite stubborn and unwilling(and unamused) to accept this idea. Especially when the answer key in assessment book normally use the "wrong" upper bound(in this example, 0.034).