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- Question
- log -1/3 81 is equal to?
Options- A. - 27
- B. - 4
- C. 4
- D. 127
- Correct Answer
- 4
ExplanationLet log-1/381 = x
? 81 = (-1/3)x
? 34 = (-1/3)x = 3-x
? x = -4 - 1. log 10x + log 10y = z, then x is equal to?
Options- A. z / y
- B. 10 / z
- C. 102 / x
- D. None of these Discuss
- 2. log 1010 + log 10100 + log 101000 + log 1010000 + log 10100000 is equal to?
Options- A. 15
- B. log 11111
- C. log101111
- D. 14 log10 100 Discuss
- 3. Find the value of log 9 81 - log 4 32?
Options- A. 1 / 2
- B. - 3 / 2
- C. - 1 / 2
- D. 2 Discuss
- 4. Find the value of log 49 16807 - log 9 27?
Options- A. 0
- B. 1
- C. 3 / 2
- D. - 1 Discuss
- 5. Find the value of log 322 8 + log 2433 7 - log 361296?
Options- A. 3
- B. 2
- C. 1
- D. 0 Discuss
- 6. If log 10 {log 10[log 10(log 10N )]} = 0, then the value of N is?
Options- A. 1010
- B. 101010
- C. 10-10
- D. 10102 Discuss
- 7. The value of 25 log 5 4 is?
Options- A. 16
- B. 5
- C. 25
- D. None of these Discuss
- 8. The value of log 10 0.000001 is?
Options- A. 6
- B. - 6
- C. 5
- D. - 5 Discuss
- 9. The value of log 10 (0.00001) is?
Options- A. - 5
- B. - 6
- C. - 7
- D. None of these Discuss
- 10. The value of log 6 log 5 15625 is?
Options- A. 1
- B. 2
- C. 3
- D. None of these Discuss
Logarithm problems
Search Results
Correct Answer: None of these
Explanation:
log10xy = z
? xy = 10z
? x = 10z/y
Correct Answer: 15
Explanation:
Given Exp. = log1010 + log10100 + log101000 + log1010000 + log10100000
= 1 + 2 + 3 + 4 + 5
= 15
Correct Answer: - 1 / 2
Explanation:
log9 81 - log4 32 = log32 34 - log22 25
= 4/2 - 5/2 = -1/2
Correct Answer: 1
Explanation:
Exp. = log4916807 - log927
= log72 75 - log32 33
=(5/2)log77 - (3/2)log33
=5/2 - 3/2
= 1
Correct Answer: 1
Explanation:
Exp. =log3228 + log24337 - log361296
= log25 28 + log35 37 - log36 362
= (8/5)log22 + (7/5)log33 - 2log3636
= 8/5 + 7/5 - 2 = 1
Correct Answer: 101010
Explanation:
If log10{log10[log10(log10N)]} = 0
? log10{log10(log10N)} = 1
? log10(log10N) = 10
? log10N = 1010
? N = 101010
Correct Answer: 16
Explanation:
Exp. = 25 log54 = 52 log54
= 5 log5 42
= 16
Correct Answer: - 6
Explanation:
Exp. = log10 10-6 = -6
Correct Answer: - 5
Explanation:
Exp. = log10 10-5 = -5
Correct Answer: 1
Explanation:
log6 log515625 = log6 log5(5)6
= log66(log55) = 1
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