5
Q:

A) 1/3 B) -3
C) -1/3 D) 3

Answer:   A) 1/3

Explanation:

\inline \fn_jvn {\color{Black} Let\; \log_{343}7\; \; \; =n}

\inline \fn_jvn {\color{Black} Then, 343^{n}\; \; \; =7}

\inline \fn_jvn {\color{Black}\Rightarrow (7^{3}) ^{n}=7}

\inline \fn_jvn {\color{Black}\Rightarrow 3n=1}

\inline \fn_jvn {\color{Black}\Rightarrow n=1/3}

Q:

If  = m, then  is equal to ?

A) 1/(1+2m) B) (1+2m)/2
C) 2m/(2m+1) D) (2m+1)/2m
 
Answer & Explanation Answer: B) (1+2m)/2

Explanation:

=
=

.

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3 146
Q:

If  , then 

A) 1 B) 2
C) 4 D) 8
 
Answer & Explanation Answer: B) 2

Explanation:

Given  

Now  = 

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4 165
Q:

If log 64 = 1.8061, then the value of log 16 will be (approx)?

A) 1.9048 B) 1.2040
C) 0.9840 D) 1.4521
 
Answer & Explanation Answer: B) 1.2040

Explanation:

Given that, 

 

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7 482
Q:

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.

A) 100 m B) 125 m
C) 150 m D) 175 m
 
Answer & Explanation Answer: C) 150 m

Explanation:

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8 760
Q:

For  and  , then which one of the following is correct?

A) P < Q B) P = Q
C) P > Q D) can't be determined
 
Answer & Explanation Answer: C) P > Q

Explanation:

 for (k,l) > 0 and  k > l

Let     k = x+1    and   l = x

 

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8 679