On a recent math test, I had the following question showing a series of six images. The answer was one of the five options A, B, C, D, or E.
Can you tell me what the correct answer is? And can you tell me what field of math the test was on?
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You should answer this test with:
B. But hang on, there are no options associated with these 5 letters...? That's because it's the letters themselves we need to consider! So our answer is literally the letter B.
Why? Because this test is in:
Topology, and we are expected to consider the number of holes in each object.
If we do that, we see we have:
Pretzel = 3 holes;
Straw = 1 hole (not 2, note);
Button = 4 holes;
Ring = 1 hole;
Symbol = 5 holes;
Target riddled with bullet-holes = 9 holes (several of the original bullet-holes have joined together, note).
Note that we have a pattern here:
These numbers are the first digits of pi: 3.14159... This means our next answer needs to represent the next digit of pi, which is '2'. Which of our options here has 2 holes? Why, that would be the letter B!