Year 10 - Unfair Question
Hi all, Just asking for an opinion on a recent practice paper.
The question (on a multiple choice paper) was a string is 16cm long to the nearest CM. What is the longest possible length it can be?
and the options where (15.5, 16.4, 16.5) and afew stupid others that I can't renember.
I put down 16.4, as anything under 16.5 rounds down(As we had been told for many years).
Apparently though, the answers IS 16.5 because
0.9(rec) = X
9.9(rec) = 10X <times both by 10>
9.0 = 9X <minus 1X>
1 = X <divide both by 9>
16.49(rec) = 16.5
and 14.49(rec) rounds down.
Even though I can't argue the theory, I still think its is a very unfair question.