Quantitative Aptitude Questions and Answers With Explanation (Practice set 2)

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Q.1. Worker A completes a task in 12 days and worker B completes the same task in 15 days. If both A and B work together, in how many days they will complete the task?

  1. Apti Time and work 22days.
  2. Apti Time and work 23days.
  3. Apti Time and work 24days.
  4. None of the above

Correct Answer(D)

Q.2. The value of Apti Simplification=?

  1. 98
  2. 35
  3. 350
  4. None of these.

Correct Answer(D)

Q.3.  If 30% of a certain number is 12.6, what is the number?
(A) 24
(B) 42
(C) 23
(D) 32

Correct Answer: (B)

Q.4. Find  the missing term of the given expression:
18.834 + 818.34 -? = 618.43
(A) 217.644
(B) 218.744
(C) 217.744
(D) 217.844

Correct Answer: (B)

Q.5. What is the market price of a 9% share when a person gets 180 by investing Rs. 4000?
(A) 150
(B) 200
(C) 250
(D) 300

Correct Answer: (B)

Q.6. Complete the series 2, 5, 9, 19, 37.......
(A) 76
(B) 74
(C) 75
(D) None of these.

Correct Answer: (C)

Q.7. The average weight of 10 men is decreased by 2 kg when one of them whose weight is 60 kg is replaced by a new man. What is the weight of the new man?
(A) 35 kg
(B) 40 kg
(C) 45 kg
(D) 50 kg

Correct Answer: (B)

Q.8. Mohan gets a salary of Rs. 6435, Rs. 6927, Rs. 6855, Rs. 7230 and Rs. 6562 for 5 months. How much salary he must-have in the sixth month so that he gets an average of Rs. 6500?
(A) 4091
(B) 4991
(C) 3499
(D) 3344

Correct Answer: (B)

Q.9. A man purchases a TV for Rs. 8000 and sells it at 10% loss. What is the selling price of T.V?
(A) Rs.7200
(B) Rs.7000
(C) Rs.6900
(D) Rs.6500

Correct Answer: (A)

Q.10. What is the average of the first five multiples of 12?
(A) 36
(B) 38
(C) 40
(D) 42

Correct Answer: (A)

 

ANSWERS WITH EXPLANATION

A.1. Correct Answer(D)

Explanation:

Worker A completes the task in 12 days. So in one day, he will complete the 1/12 part of the task.

So, A's one day work =1/12

Similarly, B's one day work =1/15

∴ (A+B)'s one day work =1/12+1/15=3/20

3/20 of the task is completed in one day so both will complete the whole task in 20/3 days

A.2.Correct Answer(D)

Explanation:

Apti Simplification

A.3. Correct Answer(B)

Explanation:

Let the required number be x.
So, according to the question:
Apti Problems on Numbers

A.4. Correct Answer: (B)

Explanation:

18.834 + 818.34 - ? = 618.43
Or, 18.834 + 818.340 - 618.43 =?
837.174 - 618.430 = 218.744

A.5. Correct Answer: (B)

Explanation:

Let the face value of the share = Rs. 100
Dividend per share = 9
As per the question, an income of Rs. 180 is obtained from an investment of Rs. 4000.
So, an income of Rs. 9 is obtained from an investment of Rs. = (4000/180) * 9 = 200
So, the market price of the share = Rs. 200

A.6. Correct Answer: (C)

Explanation:

The second number is one more than twice the first,
2 x 2 +1 = 5
The third number is one less than twice the second,
5 x 2 -1 = 9
The fourth number is one more than twice the third,
9 x 2 +1 = 19
The fifth number is one less than twice the fourth.
19 x 2 - 1 = 37
Therefore, the sixth number is one more than twice the fifth. So, the missing number:
37 x 2 + 1 = 75.

A.7. Correct Answer: (B)

Explanation

The average decrease in weight per person = 2kg
There are 10 men so a total decrease in weight on replacing a man with a new man = 10 ∗ 2= 20 kg
Weight of the man who is replaced = 60 kg
∴The weight of the new man would be = Weight of man replaced - total decrease in weight of the group of 10 men.
= 60 - 20 = 40 kg

A.8. Correct Answer: (B)

Explanation

Total salary for 5 months = Rs. (6435 + 6927 + 6855 + 7230 + 6562) = Rs. 34009.
Required salary = Rs. [ (6500 x 6) - 34009 ]
= Rs. (39000 - 34009)
= Rs. 4991

A.9. Correct Answer: (A)

Explanation

C.P. of the TV = Rs. 8000

S.P. of the TV =?

Loss incurred = 10%

Apply formula: Selling Price =Apti Profit and loss* C.P.

Therefore, S.P. =Apti Profit and loss* 8000

Apti Profit and loss* 8000 = 7200


A.10. Correct Answer: (A)

Explanation

Average = 12∗(1+2+3+4+5) ∗1/5
= 12 ∗ 15∗ 1/5
= 12 ∗ 3= 36

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