A boy agrees to work at the rate of one rupee on the first day,two rupees on the second day,four rupees on the third day and so on.How much will the boy get if he starts working on the 1st of February and finishes on the 20th of February

1.  220

2.  220 - 1  

3.  219 - 1

4.  219

5.  None of these

View Answer  
5
Correct Answer :

220 - 1

 


Explanation :
No Explanation available for this question

If the fifth term of a GP is 81 and first term is 16,what will be the 4th term of the GP

1.  36

2.  18

3.  54

4.  24

5.  27

View Answer  
5
Correct Answer :

54


Explanation :
No Explanation available for this question

Let S denote the infinite sum 2 + 5x + 9x2 + 14x3 + 20 x4 +…..where /x/< 1 and the coefficient of xn-1 is 1/(n (n + 3)), (n = 1, 2,. ... . ). Then S equals:

1.  (2 - x)/(1 -x)3

2.  (2 + x)/(1+x)2

3.  (2+ x)/(1- x)2

4.   (2 + x)/(1+x)3

View Answer  
4
Correct Answer :

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


Explanation :
No Explanation available for this question

Safdar was asked to calculaie the arithmetic mean of ten positive integers each of which had 10.1) digits. By mistake he interchanged the two digits in one of the ten integers. As a result his answer; for the arithmetic mean became 1.8 more than what it should have been. Based On this information, find the value of b - a:

1.  1

2.  2

3.  3

4.  4

View Answer  
4
Correct Answer :

2


Explanation :
No Explanation available for this question

Suppose for any real number x, [x] denotes the greater integer less than or equal to x, Let L(x, y) = [x] + [y] [x + y] and R (x, y)= [2x]+ [2y]. Then, its impossible to find any two positive. real numbers x and y. for which.

1.  L (x, y) = R (x, y)

2.  L (x, y) #.R(x, y)

3.  L (x, y)

4.  L (x, y) > R (x, y)

View Answer  
4
Correct Answer :

L (x, y) > R (x, y)


Explanation :
No Explanation available for this question

If u, v, w and m are natural numbers such that um + vm=wm, then which one of the following true:

1.  m≥ min (u, v, w)

2.  m ≥(u, v, w)

3.  m < min (u, v, w)

4.  None of these

View Answer  
4
Correct Answer :

None of these


Explanation :
No Explanation available for this question

If pqr = 1, the value of the expression 1/(1+p+q-1) ) + 1/(1+q+r-1)+ 1/1(1+ r+p-1)=

1.   p + q + r

2.  1/(p+q +r)

3.  1

4.  p-1+q-1+r-1

View Answer  
4
Correct Answer :

 p + q + r


Explanation :
No Explanation available for this question

Sanjay's shop sells samosa of different sizes. Each samosa is sold at the price of Rs. 2 per samosa up to 200 samos as. Beyond 200, for every 20 additional samosas, the price of the whole lot goes down by 10 paise per samosa. What should be the maximum size of the lot in order to maximize revenue:

1.  240

2.  300

3.  400

4.  None of these

View Answer  
4
Correct Answer :

300


Explanation :
No Explanation available for this question

Let x, y and z be distinct integers x and y are odd and positive, and z is even and positive. Which one of the following statements cannot be true

1.   (x - z)2 y is even

2.   (x - z) y2 is odd

3.   (x - z) y is odd

4.  (x y)2 z is even

View Answer  
4
Correct Answer :

 (x - z)2 y is even


Explanation :
No Explanation available for this question

X+y+Z =10, X2+Y2 +Z2 = 62, X3 + Y3 + Z3 = 340  Find the value of (xy + yz + xz).

1.  21

2.  37

3.  19

4.  20

View Answer  
4
Correct Answer :

19


Explanation :
No Explanation available for this question
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