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

**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?**

- days.
- days.
- days.
- None of the above

Correct Answer(D)

**Q.2. The value of =?**

- 98
- 35
- 350
- 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:**

**A.3. Correct Answer(B)**

**Explanation:**

Let the required number be x.

So, according to the question:

**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 =* C.P.

Therefore, S.P. =* 8000

= * 8000 = 7200

**A.10. Correct Answer: (A)**

**Explanation**

Average = 12∗(1+2+3+4+5) ∗1/5

= 12 ∗ 15∗ 1/5

= 12 ∗ 3= 36