# Three math classes: X, Y, and Z, take an algebra test.The average score in class X is 83. The average score in class Y is 76. The average score in class Z is 85. The average score of all students in classes X and Y together is 79. The average score of all students in classes Y and Z together is 81. What is the average for all the three classes

1.  81

2.  81.5

3.  82

4.  84.5

4

81

Explanation :
No Explanation available for this question

# Two men X and Y started working for a certain company at similar jobs on January 1, 1950. X asked for an initial salary of Rs. 300 with an annual increment of Rs. 30. Y asked for an initial salary of Rs. 200 with a rise of Rs. 15 every six months. Assume that the arrangements remained unaltered till December 31, 1959. Salary is paid on the last day of the month. What is the total amount paid to them as salary during the period

1.  Rs. 93,300

2.  Rs. 93,200

3.  Rs. 93,100

4.  None of these

4

Rs. 93,300

Explanation :
No Explanation available for this question

# Let b be a positive integer and a = b2 - b. If b3 = 4, then a2 - 2a is divisible by:

1.  15

2.  20

3.  24

4.  None of these

4

24

Explanation :
No Explanation available for this question

# Three friends, returning from a movie, stopped to eat at a restaurant. After dinner, they paid their bill and noticed a bowl of mints at the front counter. Sita took 1/3 of the mints, but returned four because she had a momentary pang of guilt. Fatima then took 1/4 of what was left but returned three for similar reasons. Eswari then took half of the remainder but threw two back into the bowl. The bowl had only 17 mints left when the raid was over. How many mints were originally present in the bowl

1.  38

2.  31

3.  41

4.  None of these

4

None of these

Explanation :
No Explanation available for this question

# Based on the figure below, what is the value of x, if y = 10. It is given that AD=y, AB=z, DC=x-3, BC=x+4. If AE is the perpendicular on BD, then AE=x-3.

1.  10

2.  11

3.  12

4.  None of these

4

11

Explanation :
No Explanation available for this question

# Two sides of a plot measure 32 meters and 24 meters and the angle between them is a perfect right angle. The other two sides measure 25 meters each and the other three angles are not right angles. What is the area of the plot

1.  768

2.  534

3.  696.5

4.  684

4

684

Explanation :
No Explanation available for this question

# A certain city has a circular wall around it, and this wall has four gates pointing north, south, east and west. A house stands outside the city, three kms north of the north gate, and it can just be seen from a point nine kms east of the south gate. What is the diameter of  the wall that surrounds the city

1.  6 km

2.  9 km

3.  12 km

4.  None of these

4

9 km

Explanation :
No Explanation available for this question

# Fresh grapes contain 90% water by weight while dried grapes contain 20% water by weight. What is the weight of dry grapes available from 20 kg of fresh grapes

1.  2 kg.

2.  2.4 kg

3.  2.5 kg

4.  None of these

4

2.5 kg

Explanation :
No Explanation available for this question

# In a 4 - digit number, the sum of the first two digits is equal to that of the last two digits. The sum of the first and last digits is equal to the third digit. Finally, the  sum of the second and fourth digits is twice the sum of the other two digits. What is the third digit of the number

1.  5

2.  8

3.  1

4.  4

4

5

Explanation :
No Explanation available for this question

1.  (6, 1)

2.  (-3, -4)

3.  (4, 3)

4.  (-4, -3)

4