This is the fourth of our three WitCHes on VCAA’s Specialist Mathematics Exam 1 Sample Questions. Yeah, yeah it’s Douglas Adams-ish, but it wasn’t deliberate. We were undecided on this last one, and it’s not as compelling as the others. But, for similar reasons for the other WitCHes, we changed our mind and decided to post it. (There were other close calls, and we’ll soon update this post with brief comments on all the questions.)

# Tag: integration

## Witch 95: Top of the Pops

This is the third of our three WitCHes on VCAA’s Specialist Mathematics Exam 1 Sample Questions. Newcomer aps was first to comment on the error, in regard to VCAA’s webinar, where the same question is “solved” (and see the subsequent comments on that post). Once again, it seems worthwhile to encourage a prominent discussion on an unfamiliar topic, and there is more to say than has come up so far.

## WitCH 66: Bad Pipe Dream

This our final WitCH from the 2021 NHT Methods Exam 2. It is, in its own way, a masterpiece. Continue reading “WitCH 66: Bad Pipe Dream”

## WitCH 65: Repeat Offender

The following is our second WitCH from the 2021 NHT Methods Exam 2.

## WitCH 49: Trigged Again

The question below is from the second 2020 Specialist exam (not online), and was flagged by commenter John Friend in the discussion here. John has spelled out the problems, but the question is bad enough to warrant its own post, and there’s arguably a little more to be said.

## PoSWW 15: Slippery Slope

The question below is from the second 2020 Specialist exam (not online), and was raised by commenter Red Five in the discussion here. This’ll probably turn into a WitCH but, really, the question is so damn stupid, it doesn’t deserve the honour.

## PoSWW 14: Offering Real Choices

The question below is from the first 2020 Specialist exam (not online), which is discussed here.

**UPDATE (10/09/21) **Unsurprisingly, the examination report (Word-doc-stupid-VCAA) fails to address the stupidity.

## WitCH 44: Estimated Worth

This WitCH is from Cambridge’s 2020 textbook, Mathematical Methods, Unit 1 & 2. It is the closing summary of Chapter 21A, *Estimating the area under a graph*. (It is followed by 21B, *Finding the exact area: the definite integral*.)

We’re somewhat reluctant about this one, since it’s not as bad as some other WitCHes. Indeed, it is a conscious attempt to do good; it just doesn’t succeed. It came up in a tutorial, and it was sufficiently irritating there that we felt we had no choice.

## WitCH 36: Sub Standard

This WitCH is a companion to our previous, MitPY post, and is a little different from most of our WitCHes. Typically in a WitCH the sin is unarguable, and it is only the egregiousness of the sin that is up for debate. In this case, however, there is room for disagreement, along with some blatant sinning. It comes, predictably, from Cambridge’s *Specialist Mathematics 3 & 4* (2020).

## WitCH 33: Below Average

**Pr(X > 0)**, the possible answers being

**A. 2/3 B. 3/4 C. 4/5 D. 7/9 E. 5/6**