Brain Teasers
Number Signs
For any number x, let x# be 2^x. For example, 3# = 2^3 = 8.
What is 1###?
What is 1###?
Answer
It is 16.1###=2^(1##)=2^(2^(1#))=2^(2^(2^1)).
2^2 = 4 and 4^2 = 16.
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