If a, x, b and y are real numbers and ax+by = 4 and ax2 +by2 = 2 and ax3 + by3 = −3 then find (2x − 1)(2y − 1)

1.  4

2.  3

3.  5

4.  -3

5.  cannot be determined

View Answer  
5
Correct Answer :

4


Explanation :
No Explanation available for this question

K1,K2,K3...K30 are thirty toffees. A child places these toffees on a circle, such that there are exactly n ( n is a positive integer) toffees placed between Ki and Ki+1 and no two toffees overlap each other

1.  4

2.  5

3.  9

4.  12

5.  13

View Answer  
5
Correct Answer :

12


Explanation :
No Explanation available for this question

There are two persons A and B who joined an organization on 1st Jan 1970. A joined at Rs. 300 and annual increment of Rs.30. B gets salary of Rs. 200 and hike of Rs. 50 per six month. Find the total amount distributed at the end of 31st December 1979

1.  91200

2.  92800

3.  97200

4.  None of these

View Answer  
4
Correct Answer :

None of these


Explanation :
No Explanation available for this question

A 101 digit number 222.........2X3...333  is formed by repeating the digit 2,50 times followed by the digit X and then repeating the digit 3,50 times.The number is a multiple of 7.Find the value of X.

1.  2

2.  3

3.  4

4.  5

View Answer  
4
Correct Answer :

5


Explanation :
No Explanation available for this question

There are ten coin making machine.Nine of them produces coins of 10 gm each while the tenth machine produces coins with 11 gm weight . If one has a weight measuring instrument to measure weight in grams,how many minimum number of readings are required to determine which machine produces heavier coins

1.  1

2.  2

3.  3

4.  None of these

View Answer  
4
Correct Answer :

1


Explanation :
No Explanation available for this question

If X and Y are positive integers and X + Y = 1, what is the least value of (X+1/X)2 + (Y+1/Y)2

1.  24

2.  12.5

3.  20

4.  None of these

View Answer  
4
Correct Answer :

12.5


Explanation :
No Explanation available for this question

2

1.  XY2

2.  X2Y

3.  5XY

4.  None of these

View Answer  
4
Correct Answer :

5XY


Explanation :
No Explanation available for this question

Rs. 960 is formed with denominations of Rs. 5, Rs. 2, Re. 1 coins. If the no. of coins Rs 2 and Re 1 are interchanged then the amount varies by Rs. 40. If the total no. of coins are 300, find the no. of coins of Rs. 5

1.  100

2.  140

3.  60

4.  None of these

View Answer  
4
Correct Answer :

140


Explanation :
No Explanation available for this question

For the n found in question 112, which of the two toffees are adjacently placed on the circle ( All other conditions remaining same)

1.  K11 and K13 

2.  K6 and K23

3.  K2 and K10

4.  K11 and K18

5.  K20 and K28

View Answer  
5
Correct Answer :

K11 and K18


Explanation :
No Explanation available for this question

If a=b2-b,b34,then a2 -2a is always divisible by

1.  15

2.  20

3.  24

4.  None of these

View Answer  
4
Correct Answer :

None of these


Explanation :
No Explanation available for this question
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