Logarithm Problems - Logarithm Questions and Answers for SSC and Bank exams
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Logarithm questions and answers for Competitive exams:
25. If log 2 = 0.30103, the number of digits in 264 is:
(A) 10
(B) 15
(C) 20
(D) 25
Ans . C
26. If log 2 = 0.30103, the number of digits in 520 is:
(A) 14
(B) 18
(C) 22
(D) 24
Ans . A
Let x = 520
Taking logarithm on both sides
⇒ logx = log520
⇒ logx = 20log 5
⇒ logx = 20(0.699) where log5 = 0.699
⇒ logx = 13.98
⇒ The characteristic of x is 13
⇒ The characteristic of520is 13
Therefore, the number of digits in 520 is 14.
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