What is the square root of 2,000,000,000,000,000,000,000,000,000,000,000,000,000,000?

 

   What is the square root of 2,000,000,000,000,000,000,000,000,000,000,000,000,000,000?     

 

   There are 42 zeros.  Therefore, the square root is sqrt(2) x 10²¹     

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