The speed of a railway engine is 42 Km per hour when no compartment is attached, and the reduction in speed is directly proportional to the square root of the number of compartments attached. If the speed of the train carried by this engine is 24 Km per hour when 9 compartments are attached, the maximum number of compartments that can be carried by the engine is :

1. 49

2. 48

3. 46

4. 47

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Correct Answer :

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Forty percent of the employees of a certain company are men, and 75 per cent of the men earn more than Rs. 25,000 per year. If 45 per cent of the company's employees earn more than Rs. 25,000 per year, what fraction of the women employed by the company earn Rs. 25,000 per year or less

1. 2/11

2. 1/4

3. 1/3

4. 3/4

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Correct Answer :

3/4

Explanation :
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In a survey of political preference, 78% of those asked were in favour of at least one of the proposals: I, II and III. 50% of those asked favoured proposal I, 30% favoured proposal II, and 20% favoured proposal III. If 5% of those asked favoured all three of the proposals, what percentage of those asked favoured more than one

1. 10

2. 12

3. 32

4. 22

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Navjivan Express from Ahmedabad to Chennai leaves Ahmedabad at 6:30 am and travels at 50 km per hour towards Baroda situated 100 kms away. At 7:00 am Howrah - Ahmedabad express leaves Baroda towards Ahmedabad and travels at 40 km per hour. At 7:30 Mr. Shah the traffic controller at Baroda realises that both the trains are running on the same track. How much time does he have to avert a head-on collision between the two trains

1. 15 minutes

2. 20 minutes

3. 25 minutes

4. 30 minutes

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Correct Answer :

20 minutes

Explanation :
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If r,s, and t are consecutive odd integers with r

1. rs=t

2. r+t=2t-s

3. r+s=t-2

4. r+t=2s

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Correct Answer :

r+t=2s

Explanation :
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Let S be the set of rational numbers with the following properties: I. 1/2 ε S; II. If x ε S, then both 1/x+1 ε S and (x/x+1) ε S Which of the following is true

1. S contains all rational numbers in the interval 0 < x < 1.

2. S contains all rational numbers in the interval-1 < x < 1.

3. S contains all rational numbers in the interval-1 < x < 0.

4. S contains all rational numbers in the interval 1 < x < ∞.

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Correct Answer :

S contains all rational numbers in the interval 0 < x < 1.

Explanation :
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P,Q and R the three consecutive odd numbers in ascending order. If the value of three times P is three times P is three less than two times R, find the value of R.

1. 5

2. 7

3. 9

4. 11

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Correct Answer :

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Consider the following statements: When two straight lines intersect, then: I.adjacent angles are complementary II.adjacent angles are supplementary III.opposite angles are equal IV.opposite angles are supplementary Of these statements:

1. (I) and (III) are correct

2. (II) and (III) are correct

3. (I) and (IV) are correct

4. (II) and (IV) are correct

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Correct Answer :

(II) and (III) are correct

Explanation :
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A pole has to be erected on the boundary of a circular park of diameter 13 meters in such a way that the difference of its distances from two diametrical opposite fixed gates A and B on the boundary is 7 meters. The distance of the pole from one of the gates is:

1. 8 meters

2. 8.25 meters

3. 5 meters

4. None these

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Correct Answer :

5 meters

Explanation :
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If a car has both tined glass and leather seats, what is greatest number of additional options that the car could have

1. 1

2. 2

3. 3

4. 4

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Correct Answer :

Explanation :
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