If three positive real numbers a, b and c(c>a) are in Harmonic Progression, then log(a+c)+log(a-2b+c) is equal to:

1.   2log(c-b)

2.   2log(a-c)

3.  2log(c-a)

4.  loga+logb+logc

View Answer  
4
Correct Answer :

2log(c-a)


Explanation :
No Explanation available for this question

For constructing the working class consumer price index number of a particular town, the following weights corresponding to different group of items were assigned: Food-55, Clothing-10, Rent-8, and Miscellaneous-12. It is known that the rise in food prices is double that of fuel and the rise in miscellaneous group prices is double that of rent. In October 2006, the increased D.A. by a factory of that town by 182% fully compensated for the rise in prices of food and rent but did not compensate for anything else. Another factory of the same locality increased D.A. by 46.5%, which compensated for the rise in fuel and miscellaneous groups. Which is the correct combination of the rise in prices of food fuel, rent and miscellaneous groups

1.   320.14, 159.57, 95.64, 166.82

2.  317.14, 158.57, 94.64, 189.28

3.  311.14, 158.57, 90.64, 198,28           

4.   321.14, 162.57, 84.46, 175.38

View Answer  
4
Correct Answer :

317.14, 158.57, 94.64, 189.28


Explanation :
No Explanation available for this question

In a factory making radioactive  substances, it was considered that the three cubes of uranium together are hazardous. So the company authorities decided to have the stack of uranium interspersed with lead cubes. But there is a new worker in a company who does not know the rule. So he arranges the uranium stack the way he wanted. What is the number of hazardous combinations of uranium in stack of 5

1.  3

2.  7

3.  8

4.  10

View Answer  
4
Correct Answer :

8


Explanation :
No Explanation available for this question

If mxm-nxn = 0, then what is the value of [1/(xm+xn)+[1/(xm-xn) in terms of xn

1.  2mn/[xn(n2-m2)]

2.  2mn/[xn(n2+m2)]

3.  2mn/[xn(m2-n2)]

4.  2mn/[xn(m2+n2)]

View Answer  
4
Correct Answer :

2mn/[xn(n2-m2)]


Explanation :
No Explanation available for this question

In a certain zoo, there are 42 animals in one sector, 34 in the second sector and 20 in the third sector. Out of this, 24 graze in sector one- and also in sector two. 10 graze in sector two and sector three, 12 graze in sector one and sector three. These figures also include four animals grazing in all the three sectors are now transported to another zoo, find the total number of animals.

1.   38

2.  56

3.  54

4.  None of the above

View Answer  
4
Correct Answer :

54


Explanation :
No Explanation available for this question

The ratio of the roots of bx2+nx+n=0 is p:q, then

1.  √(q/p)+√(p/q)+√(l/n)=0

2.  √(p/q)+√(q/p)+√(n/l)=0

3.  √(q/p)+√(p/q)+√(l/n)=0

4.  √(p/q)+√(q/p)+√(n/l)=0

View Answer  
4
Correct Answer :

√(p/q)+√(q/p)+√(n/l)=0


Explanation :
No Explanation available for this question

The average age of a couple is 25 years. The average age of the family just after the birth of the first child was 18 years. The average age of the family just after the second child was born was 15 years. The average age of the family after the third and the fourth children (who are twins) were born was 12 years. If the present average age of the family of six persons is 16 years, how old is the eldest child

1.  6 years

2.   7 years

3.   8 years

4.  9 years

View Answer  
4
Correct Answer :

9 years


Explanation :
No Explanation available for this question

10% of the voters did not cast their vote in an election between two candidates. 10% of the votes polled were found invalid. The successful candidate got 54% of the valid votes and won by a majority of 1620 votes. The number of voters enrolled on the voters list was:

1.  25000

2.  33000

3.  35000

4.  40000

View Answer  
4
Correct Answer :

25000


Explanation :
No Explanation available for this question

The resistance of a wire is proportional to its length and inversely proportional to the square of its radius. Two wires of the same material have the same resistance and their radii are in the ratio 9 : 8. If the length of the first wire is 162 cms., find the length of the other.

1.   64cm.

2.  120cm.

3.  128cm.

4.  132cm.

View Answer  
4
Correct Answer :

64cm.


Explanation :
No Explanation available for this question

A 20 liter vessel is filled with alcohol. Some of the alcohol is poured out into another vessel of an equal capacity, which is then completely filled by adding water. The mixture thus obtained is then poured into the first vessel to capacity. Then 6 2/3 liters is poured from the first vessel into the second. Both vessels now contain an equal amount of alcohol. How much alcohol was originally poured from the first vessel into the second

1.  9 liters

2.  10 liters

3.  12 liters

4.  12.5 liters

View Answer  
4
Correct Answer :

10 liters


Explanation :
No Explanation available for this question
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