Let S denote the infinite sum 2+5x+9x2+14x3+20x4+ ……., where |x|

1.  (2-x)/(1-x)3

2.  (2-x)/(1+x)3

3.  (+-x)/(1-x)3

4.  (2+x)/(1+x)3

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4
Correct Answer :

(2-x)/(1-x)3


Explanation :
No Explanation available for this question

In the adjoining figure ABCD rectangle and, a semi-circle with centre O is inscribed inside the rectangle touching side BC and passing through points A and D, A circle is inscribed inside the rectangle touching the semi-circle and the sides of the rectangle as shown. The ratio of the area of the circle to the area of the semi-circle

1.  (√2-1)2/2

2.  (√2-1)2/4

3.  2(√2-1)2

4.  None of these

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4
Correct Answer :

None of these


Explanation :
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How many numbers are there between 200 and 300 in which 9 occurs only once

1.  19

2.  20

3.  21

4.  18

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4
Correct Answer :

18


Explanation :
No Explanation available for this question

An amount of Rs.417 is divided among A, B, C and D such that A gets Rs.13 more than B, B gets Rs.9 more than C and C gets Rs.6 more than D. A’s share is

1.  121

2.  116

3.  120

4.  124

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4
Correct Answer :

120


Explanation :
No Explanation available for this question

Manju took Rs. 20000 at 5% SI for 2 years and invested it at 4% CI for same period. Find her gain/loss.

1.  Rs. 368 gain

2.  Rs.423 gain

3.  Rs. 368 loss

4.  Rs. 200 gain

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4
Correct Answer :

Rs. 368 loss


Explanation :
No Explanation available for this question

A spends 1/4th of his leisure on reading books, 2.3rd of the remaining on watching TV. If he spends 2 hrs on watching TV what is the total time of her leisure

1.  6 hrs

2.  8 hrs

3.  2 hrs

4.  4 hrs

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4
Correct Answer :

6 hrs


Explanation :
No Explanation available for this question

A plant reproduces at the rate of 25% every 12 min. In approximately what time will it triple itself

1.  90 min

2.  60 min

3.  40 min

4.  75 min

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4
Correct Answer :

60 min


Explanation :
No Explanation available for this question

What strength of 20 ml acid should be added to 10 ml of 50% acid to get an average strength of 20% acid

1.  0.5%

2.  5%

3.  50%

4.  5.5%

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4
Correct Answer :

0.5\%


Explanation :
No Explanation available for this question

A dishonest shopkeeper uses 800 gm weight instead of 1ks and mixes 20% impurities to wheat. Find his gain %.

1.  30

2.  40

3.  50

4.  60

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4
Correct Answer :

50


Explanation :
No Explanation available for this question

If the price of sugar increases by 30% by what percentage the consumption be reduced to make the expenditure same  

1.  25

2.  20

3.  23

4.  16 2/3

View Answer  
4
Correct Answer :

23


Explanation :
No Explanation available for this question
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