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  1. Find the no. of digits in 857 (given that log102 = 0.3010)
    1. 52
    2. 50
    3. 51
    4. 53
Correct Option: A

857 = (23)57 = 2171
∴ Required answer = (171 log10 2 + 1 )
= [171 x 0.3010] + 1 = [51.4710] +1
= 51+1 =52


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