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Fill in (Posted on 2014-09-24) Difficulty: 2 of 5
2, 3, 5, 7, 2, 4, 8, 10, ?, 11...

What number should replace the "?" ?

See The Solution Submitted by Ady TZIDON    
Rating: 5.0000 (1 votes)

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Not sure why you would do this... | Comment 2 of 6 |
The list starts with the first 4 primes
then comes 9 less than the next 4 primes
11 is 18 less than 29
So maybe the missing number is 18 less than 23 so the ?=5

Edited to fix: the tenth prime is 29 not 27.

Edited on September 25, 2014, 9:52 am
  Posted by Jer on 2014-09-24 10:56:48

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