picoCTF2018 - Miscellaneous - General Warmup2 Objective: Can you convert the number 27 (base 10) to binary (base 2)? Solution: so just a simple Binary conversion here. If you don't know how to do this google around for Decimal to binary 128 64 32 16 8 4 2 1 0 0 0 0 0 0 0 0 if you switch any one of the zeros in that to a one, you can add the values on top to make the number like 128 64 32 16 8 4 2 1 0 0 1 0 0 0 0 0 would equal 32 128 64 32 16 8 4 2 1 0 0 1 0 0 0 0 1 this would equal 33 so to solve for 27 128 64 32 16 8 4 2 1 0 0 0 1 1 0 1 1 so the answer would be 11011 picoCTF{11011}
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