3, 9, 27, 81, … What is the next number in the sequence?


Is it

a) 108

b) 130

c) 162

d) 243

?

If you picked d), you would be correct.

If you picked a) or b) or c), you would still be correct.

Have a look at this fairly short article (5 pages) by Donald White of KSU titled “When Every Answer is Correct: Why Sequences and Number Patterns Fail the Test”

http://www.math.kent.edu/~white/papers/pattern.pdf

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