Aptitude

Topic: Logarithms

If log 2 = 0.30103, the number of digits in 2^64 is:A.18 B.19C.20 D.21

log (2^64)= 64 x log 2= (64 x 0.30103)= 19.26592Its characteristic is 19.Hence, then number of digits in 2^64 is 20.

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