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- Question
If log 64 = 1.8061, then the value of log 16 will be (approx)?
Options- A. 1.9048
- B. 1.2040
- C. 0.9840
- D. 1.4521
- Correct Answer
- 1.2040
ExplanationGiven that, log 64 = 1.8061
i.e
--> 3 log 4 = 1.8061
--> log 4 = 0.6020
--> 2 log 4 = 1.2040
Therefore, log 16 = 1.2040
- 1. If logxl+m-2n = logym+n-2l = logzn+l-2m , then xyz is equal to
Options- A. 0
- B. 1
- C. lmn
- D. 2 Discuss
- 2. Find the logarithm of 144 to the base 23 :
Options- A. 2
- B. 4
- C. 8
- D. None of these Discuss
- 3. If log72 = m, then log4928 is equal to ?
Options- A. 1/(1+2m)
- B. (1+2m)/2
- C. 2m/(2m+1)
- D. (2m+1)/2m Discuss
- 4. If logx916 = -12, then the value of x?
Options- A. -3/4
- B. 3/4
- C. 81/256
- D. 256/81 Discuss
- 5. If logaab = x, then logbab = ?
Options- A. 1/x
- B. x/(x+1)
- C. x/(1-x)
- D. x/(x-1) Discuss
- 6. A fast moving superfast express crosses another pasenger train in 20 seconds. The speed of faster train is 72 km/hr and speeds of slower train is 27 km/h. Also the length of faster ntrain is 100m, then find the length of the slower train if they are moving in the same direction.
Options- A. 100 m
- B. 125 m
- C. 150 m
- D. 175 m Discuss
- 7. The value of 1log360+1log460+1log560is
Options- A. 0
- B. 1
- C. 5
- D. 60 Discuss
- 8. If log8x = 313 then find the value of x?
Options- A. 25
- B. 32
- C. 37
- D. None of these Discuss
- 9. What is the number of digits in 333 ? Given that log3 = 0.47712?
Options- A. 12
- B. 13
- C. 14
- D. 15 Discuss
- 10. if logab+logba=loga+b,then
Options- A. a + b = 1
- B. a - b = 1
- C. a = b
- D. ab=1 Discuss
Logarithm problems
Search Results
Correct Answer: 1
Correct Answer: 4
Explanation:
Correct Answer: (1+2m)/2
Explanation:
=
=
=
=
.
Correct Answer: 256/81
Correct Answer: x/(x-1)
Correct Answer: 150 m
Explanation:
X=150m
Correct Answer: 1
Explanation:
=>
=>
= 1
Correct Answer: 32
Correct Answer: 13
Explanation:
Let =
Then,
= 27 x 0.47712 = 12.88224
Since the characteristic in the resultant value of log x is 12
The number of digits in x is (12 + 1) = 13
Hence the required number of digits in is 13.
Correct Answer: a + b = 1
Explanation:
so, a+b=1
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