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six and thirteen (Posted on 2018-03-15) Difficulty: 3 of 5
Part one:

Compose number 6 with each digit using the digit only three times (Ex: 6=2+2+2) Allowed basic operations (+,-,*,/), sqrt and factorial (no others).

Part two:

Get number 13 using only number 2 three times. Allowed basic and not-basic operations.

No Solution Yet Submitted by armando    
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Solution part 2 | Comment 4 of 9 |
if p(n)   denotes n-th prime 13  is the sixth prime:
so p(6)=p(2+2+2)==13

  Posted by Ady TZIDON on 2018-03-15 18:43:10
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