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Logarithm Questions & Answers

Practice important Logarithm questions to accurately solve them in the exams. Logarithm questions and answers have a low weightage in the examination and must be refined.

Q11

Q11 If  logx y = 100 and  log2 x = 10, then the value of y is:

A

2^10

B

2^100

C

2^1000

D

2^10000

Q12

Q12 The value of log216 is:

A

1/8

B

4

C

8

D

16

Q13

Q13 Find the value of  log2 2+ log2 22+ log2 23+ ........ + log2 2n.

A

n(n+1)/2

B

n+1

C

n

D

2n

Q14

Q14 Express 2 log x + 3 log y = log a in logarithm free form.

A

x

B

x^2y^3

C

y

D

xy

Q15

Q15 Find the value of x, if log10(x-10)=1.

A

20

B

30

C

40

D

50

Q16

Q16 Find the value of x, if log (x+5) + log (x-5) = 4 log 2 + 2 log 3

A

15

B

12

C

13

D

25

Q17

Q17 Solve for x, if (log 225/log15) = log x

A

100

B

200

C

150

D

250

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