Quizsummary
0 of 20 questions completed
Questions:
 1
 2
 3
 4
 5
 6
 7
 8
 9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
Information
Number of Questions: 20
Time: 20 Minutes
Category: Aptitude
You must specify a text. 

You must specify an email address. 

You must specify a number. 
You have already completed the quiz before. Hence you can not start it again.
Quiz is loading...
You must sign in or sign up to start the quiz.
You have to finish following quiz, to start this quiz:
Results
0 of 20 questions answered correctly
Your time:
Time has elapsed
You have reached 0 of 0 points, (0)
Average score 

Your score 

Categories
 Average 0%
Pos.  Name  Entered on  Points  Result 

Table is loading  
No data available  
 1
 2
 3
 4
 5
 6
 7
 8
 9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 Answered
 Review

Question 1 of 20
1. Question
Average of all prime numbers between 30 to 50
Correct
Answer: Option D
Explanation:
Prime numbers between 30 and 50 are:
31, 37, 41, 43, 47Average of prime numbers between 30 to 50 will be
= =39.8Incorrect
Answer: Option D
Explanation:
Prime numbers between 30 and 50 are:
31, 37, 41, 43, 47Average of prime numbers between 30 to 50 will be
= =39.8 
Question 2 of 20
2. Question
Find the sum of first 30 natural numbers
Correct
Answer: Option C
Explanation:
Sum of n natural numbers
=n(n+1)2
=n(n+1)2
=30(30+1)/2=30(31)/2=465Incorrect
Answer: Option C
Explanation:
Sum of n natural numbers
=n(n+1)2
=n(n+1)2
=30(30+1)/2=30(31)/2=465 
Question 3 of 20
3. Question
Average age of boys in a class is 16 years and average age of girls is 15 years, what is the average age of all
Correct
Answer: Option D
Explanation:
As number of girls and boys is not given so result cant be computed
Incorrect
Answer: Option D
Explanation:
As number of girls and boys is not given so result cant be computed

Question 4 of 20
4. Question
A batsman makes a score of 87 runs in the 17th match and thus increases his average by 3. Find his average after 17th match
Correct
Answer: Option D
Explanation:
Let the average after 17th match is x
then the average before 17th match is x3so 16(x3) + 87 = 17x
=> x = 87 – 48 = 39Incorrect
Answer: Option D
Explanation:
Let the average after 17th match is x
then the average before 17th match is x3so 16(x3) + 87 = 17x
=> x = 87 – 48 = 39 
Question 5 of 20
5. Question
A grocer has a sale of Rs. 6435, Rs. 6927, Rs. 6855, Rs. 7230 and Rs. 6562 for 5 consecutive months. How much sale must he have in the sixth month so that he gets an average sale of Rs. 6500?
Correct
Answer: Option A
Explanation:
Total sale for 5 months = Rs. (6435 + 6927 + 6855 + 7230 + 6562) = Rs. 34009.
Required sale = Rs. [ (6500 x 6) – 34009 ]
= Rs. (39000 – 34009)
= Rs. 4991.
Incorrect
Answer: Option A
Explanation:
Total sale for 5 months = Rs. (6435 + 6927 + 6855 + 7230 + 6562) = Rs. 34009.
Required sale = Rs. [ (6500 x 6) – 34009 ]
= Rs. (39000 – 34009)
= Rs. 4991.

Question 6 of 20
6. Question
The average of 20 numbers is zero. Of them, at the most, how many may be greater than zero?
Correct
Answer: Option D
Explanation:
Average of 20 numbers = 0.
Sum of 20 numbers (0 x 20) = 0.
It is quite possible that 19 of these numbers may be positive and if their sum is a then 20th number is (a).
Incorrect
Answer: Option D
Explanation:
Average of 20 numbers = 0.
Sum of 20 numbers (0 x 20) = 0.
It is quite possible that 19 of these numbers may be positive and if their sum is a then 20th number is (a).

Question 7 of 20
7. Question
The captain of a cricket team of 11 members is 26 years old and the wicket keeper is 3 years older. If the ages of these two are excluded, the average age of the remaining players is one year less than the average age of the whole team. What is the average age of the team?
Correct
Answer: Option A
Explanation:
Let the average age of the whole team by x years.
11x – (26 + 29) = 9(x 1)
11x – 9x = 46
2x = 46
x = 23.
So, average age of the team is 23 years.
Incorrect
Answer: Option A
Explanation:
Let the average age of the whole team by x years.
11x – (26 + 29) = 9(x 1)
11x – 9x = 46
2x = 46
x = 23.
So, average age of the team is 23 years.

Question 8 of 20
8. Question
The average weight of A, B and C is 45 kg. If the average weight of A and B be 40 kg and that of B and C be 43 kg, then the weight of B is:
Correct
Answer: Option D
Explanation:
Let A, B, C represent their respective weights. Then, we have:
A + B + C = (45 x 3) = 135 …. (i)
A + B = (40 x 2) = 80 …. (ii)
B + C = (43 x 2) = 86 ….(iii)
Adding (ii) and (iii), we get: A + 2B + C = 166 …. (iv)
Subtracting (i) from (iv), we get : B = 31.
B’s weight = 31 kg.
Incorrect
Answer: Option D
Explanation:
Let A, B, C represent their respective weights. Then, we have:
A + B + C = (45 x 3) = 135 …. (i)
A + B = (40 x 2) = 80 …. (ii)
B + C = (43 x 2) = 86 ….(iii)
Adding (ii) and (iii), we get: A + 2B + C = 166 …. (iv)
Subtracting (i) from (iv), we get : B = 31.
B’s weight = 31 kg.

Question 9 of 20
9. Question
A library has an average of 510 visitors on Sundays and 240 on other days. The average number of visitors per day in a month of 30 days beginning with a Sunday is
Correct
Answer: Option D
Explanation:
Since the month begins with a Sunday, to there will be five Sundays in the month.
Required average
=
== 285
Incorrect
Answer: Option D
Explanation:
Since the month begins with a Sunday, to there will be five Sundays in the month.
Required average
=
== 285

Question 10 of 20
10. Question
The average of six numbers is X and the average of three of these is Y.If the average of the remaining three is z, then
Correct
Answer: Option B
Explanation:
X =((3y+3z)/6)
or
2X= y + zIncorrect
Answer: Option B
Explanation:
X =((3y+3z)/6)
or
2X= y + z 
Question 11 of 20
11. Question
find the average of first 40 natural numbers?
Correct
sum of first n natural numbers=n(n+1)/2;
So,sum of 40 natural numbers=(40*41)/2=820.
Therefore the required average=(820/40) =20.5.
Incorrect
sum of first n natural numbers=n(n+1)/2;
So,sum of 40 natural numbers=(40*41)/2=820.
Therefore the required average=(820/40) =20.5.

Question 12 of 20
12. Question
find the average of first 20 multiples of 7?
Correct
Required average =7(1+2+3+…….+20)/20
=(7*20*21)/(20*2)
=(147/2)
=73.5.
Incorrect
Required average =7(1+2+3+…….+20)/20
=(7*20*21)/(20*2)
=(147/2)
=73.5.

Question 13 of 20
13. Question
the average of four consecutive even numbers is 27. find the largest of these numbers?
Correct
let the numbers be x,x+2,x+4 and x+6. then,
(x+(x+2)+(x+4)+(x+6))/4) = 27
=(4x+12)/4 = 27
x+3=27
x=24.
Therefore the largest number=(x+6)=24+6=30
Incorrect
let the numbers be x,x+2,x+4 and x+6. then,
(x+(x+2)+(x+4)+(x+6))/4) = 27
=(4x+12)/4 = 27
x+3=27
x=24.
Therefore the largest number=(x+6)=24+6=30

Question 14 of 20
14. Question
The average of 25 result is 18.The average of 1^{st} 12 of them is 14 & that of last 12 is 17.Find the 13^{th} result.
Correct
Clearly 13^{th} result=(sum of 25 results)(sum of 24 results)
=(18*25)(14*12)+(17*12)
=450(168+204)
=450372
=78.
Incorrect
Clearly 13^{th} result=(sum of 25 results)(sum of 24 results)
=(18*25)(14*12)+(17*12)
=450(168+204)
=450372
=78.

Question 15 of 20
15. Question
The average waight of A,B,C is 45 Kg. The avg wgt of A & B be 40Kg & that of B,C be 43Kg. Find the wgt of B.
Correct
Let A,B,c represent their individual wgts.
Then,
A+B+C=(45*3)Kg=135Kg
A+B=(40*2)Kg=80Kg & B+C=(43*2)Kg=86Kg
B=(A+B)+(B+C)(A+B+C)
=(80+86135)Kg
=31Kg.
Incorrect
Let A,B,c represent their individual wgts.
Then,
A+B+C=(45*3)Kg=135Kg
A+B=(40*2)Kg=80Kg & B+C=(43*2)Kg=86Kg
B=(A+B)+(B+C)(A+B+C)
=(80+86135)Kg
=31Kg.

Question 16 of 20
16. Question
The average weight of 10 oarsmen in a boat is increased by 1.8 kg when one of the crew, who weighs 53 kg is replaced by a new man. Find the weight of the new man.
Correct
Total weight increased =(1.8 x 10) kg =18 kg.
:. Weight of the new man =(53 + 18) kg =71 kg.
Incorrect
Total weight increased =(1.8 x 10) kg =18 kg.
:. Weight of the new man =(53 + 18) kg =71 kg.

Question 17 of 20
17. Question
A batsman makes a score of 87 runs in the 17th inning and thus increases his avg by 3. Find his average after 17th inning.
Correct
Let the average after 17th inning = x.
Then, average after 16th inning = (x – 3).
:. 16 (x – 3) + 87 = 17x or x = (87 – 48) = 39.
Incorrect
Let the average after 17th inning = x.
Then, average after 16th inning = (x – 3).
:. 16 (x – 3) + 87 = 17x or x = (87 – 48) = 39.

Question 18 of 20
18. Question
If the average marks of three batches of 55, 60 and 45 students respectively is 50, 55, 60, then the average marks of all the students is:
Correct
Required average
=(55 x 50 + 60 x 55 + 45 x 60)/(55 + 60 + 45)
=(2750 + 3300 + 2700)/160
=8750/160
= 54.68Incorrect
Required average
=(55 x 50 + 60 x 55 + 45 x 60)/(55 + 60 + 45)
=(2750 + 3300 + 2700)/160
=8750/160
= 54.68 
Question 19 of 20
19. Question
In a class, the average age of 30 boys is 13 years and the average of 20 girls is 12 years. what is the average age of the whole class?
Correct
Total age of 50 students
(30X 13+20 X 12) = 630
Average = 630/50 = 12.6 Years
Incorrect
Total age of 50 students
(30X 13+20 X 12) = 630
Average = 630/50 = 12.6 Years

Question 20 of 20
20. Question
The average of 5 consecutive numbers is n. if the next two number are also included. The average will?
Correct
Incorrect