alleryStart learning →What is log base 10 of 1000?
- 10
- 3
- 100
- 2
Show answer and solution
Correct answer: B. 3
1000 equals 10^3, so the common logarithm is 3.
CA Foundation Ratio and Proportion, Indices and Logarithms — practice questions — page 3
Explore 74 free Ratio and Proportion, Indices and Logarithms questions in CA Foundation Quantitative Aptitude. Open each question or exercise to read its content, reference answers and available explanation.
Practise Ratio and Proportion, Indices and Logarithms with Quill →Ratio and Proportion, Indices and Logarithms questions and exercises with answers
Showing questions 61–74 of 74.
What is log base 10 of 1000?Read the answer and worked solution →To what power must 3 be raised to give 81?Read the answer and worked solution →For any valid base b, log of 1 to base b equalsRead the answer and worked solution →Given log 2 = 0.3010 and log 3 = 0.4771, log 6 equalsRead the answer and worked solution →Given log 2 = 0.3010, the value of log 4 isRead the answer and worked solution →The common logarithm uses which base?Read the answer and worked solution →The base of the natural logarithm is approximatelyRead the answer and worked solution →Who introduced logarithms in 1614?Read the answer and worked solution →Who published the first set of base-10 logarithms in 1617?Read the answer and worked solution →If log10 of an integer is 3.78, how many digits does it have?Read the answer and worked solution →Log of a product xy equalsRead the answer and worked solution →For positive a and b (not 1), (log base a of b) x (log base b of a) equalsRead the answer and worked solution →The value of log base 5 of 125 plus log base 2 of 8 isRead the answer and worked solution →If log base x of 64 equals 3, then x equalsRead the answer and worked solution →
Worked practice questions
To what power must 3 be raised to give 81?
- 4
- 3
- 27
- 9
Show answer and solution
Correct answer: A. 4
3 x 3 x 3 x 3 = 81, so the exponent is 4.
For any valid base b, log of 1 to base b equals
- -1
- 1
- b
- 0
Show answer and solution
Correct answer: D. 0
b^0 = 1 for every valid base, so the logarithm of 1 is 0.
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