If log 2 = 0.30103, the number of digits in 520 is  Choose the correct choice from the following answers:
A) 14 B) 16 C) 18 D) 25 E) 26
Solution   Log 520	=20 log 5   =20 ×[log(10/2)]   =20 (log 10 - log 2)   =20 (1 - 0.3010)   =20×0.6990   =13.9800.   Characteristics	= 13.   Hence, the number of digits in Log 5(20) is 14.   14nswer 14
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If log 2 = 0.30103, the number of digits in 520 is