#### Quantitative Aptitude Problems With Answers - Free Online Practice Test

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1.

A sum of money amounts to Rs. 9800 after 5 years and Rs. 12005 after 8 years at the same rate of simple interest. The rate of interest per annum is:

**Answer: Option 'B'**

**Simple Interest for 3 years = Rs. (12005 - 9800) = Rs. 2205
Simple Interest for 5 years = Rs. [(2205/3) × 5] = Rs. 3675
Principle = Rs.(9800 - 3675) = Rs. 6125
Rate = 12%**

2.

Eight people enter a partnership. Six of them bring in Rs.30 each. The seventh brings in Rs. 10 more than the average of all eight and the eighth brings in Rs. 55. What is the total sum brought in?

**Answer: Option 'C'**

**Amount brought in by the first six persons = 6 * 30 = Rs. 180
Amount brought in by the eighth person = Rs. 55
Let the amount brought by the seventh person be Rs. x
x = Avg(8 persons) + 10
= (180 + 55 + x)/8 + 10
= (235 + x)/8 + 10
8x = 235 + x + 80
7x = 315
x = 45
Total amount = 235 + 45 = Rs.280**

3.

Naresh analysed the monthly salary figures of five vice presidents of his company. All the salary figures are in integer lakhs. The mean and the median salary figures are Rs. 5 lakhs, and the only mode is Rs. 8 lakhs. Which of the options below is the sum of the highest and the lowest salaries?

**Answer: Option 'B'**

**Mean Average of the values. Median Middle value.
Mode Value with highest number of occurrences.
Let the salaries of the five vice-presidents in ascending order in lakhs be a, b, c, d and e.
Mean = 5 (a + b + c + d + e)/5 = 5 lakhs
a + b + c + d + e = 25 lakhs
Median = 5 lakhs c is the middle value.
c = 5
Mode = 8 lakhs
8 should be the salary of more than 1 VP.
Only d and e are greater than 5.
So, d = e = 8 lakhs
Two possible values, a = 1, b = 3, a = 2, b = 2
Both a and b can't be 2 since there is only one mode(8).
So, a = 1, b = 3 Sum of highest and lowest = a + e = 1 + 8 = Rs. Rs. 9 lakhs
**

4.

The owener of an electronic store charges his customer11% more than the cost price. If a customer paid Rs. 1,33,200 for an LED TV, what was the original price of the TV?

**Answer: Option 'A'**

**Selling Price = 11% more than Cost Price = (111/100) × CP
(111/100) × CP = 133200 CP = 133200 × 100/111 = Rs. 1,20,000/-**

5.

A wall is built by 17 men in 24 days. In how many days can 18 men do the work if hours per day are reduced in the ratio 5 : 4?

**Answer: Option 'C'**

**Let the initial per day be x and the new hours per day be (4/5) x men and days are inversely proportinal.
Hours per day and number of days are inversely proportinal.
17 men working x hours per day --> 24 days
18 men working (4x/5) hours per day = 24 × (17/18) × (x/(4x/5))
24 × (17/18) × (5/4) = 28.33 days**

6.

A father is three times as old as his son. After fifteen years the father will be twice as old as his son's age at that time. Hence the father's present age is

**Answer: Option 'C'**

**Lets The father's age as F
Son's age as S, now according to question
F = 3S,
After 15 years age of both father and son will be
=> F + 15 = 2(S + 15)
ON Solving the two equations,
F = 45
So the father present age is 45 years**

7.

In one hour, a boat travels 9 km upstream. It takes the same time to travel 15 km downstream. Find the speed of the stream.

**Answer: Option 'B'**

**Let,
Upstream speed as u
Downstream speed as d
=> u = 9kmph, d = 15 kmph
=> s = (d-u)/2 = (15-9)/2 = 3 kmph
**

8.

Five bells commence tolling together and toll at intervals of 2, 5, 6, 8 and 9 seconds respectively. How many times do they toll together in an hour?

**Answer: Option 'B'**

**They toll together at the zeroth second.
The next time they toll together = LCM(2,5,6,8,9) = 360 seconds = 6 minutes
Every 6 minutes, they toll together.
In an hour(60 mins), they toll together (60/6) + 1 = 11 times
1 is added because they toll at the zeroth second 0,6,12,18,24,30,36,42,48,54,60**

9.

A, B and C jointly thought of engaging themselves in a business venture. It was agreed that A world invest Rs. 6500/- for 6 months, B, Rs. 8400/- for 5 months and C, Rs. 10,000 for 3 months. A is the only working partner and hence gets 8% of the profits. The profits earned was Rs. 7400. Calculate the share of B in the profit.

**Answer: Option 'D'**

**A : B : C = (6500 * 6) : (8400 * 5) : (10000 * 3) = 13 : 14 : 10
8% goes to A.
Of the remaining 92%,
B's share = 0.92 * 7400 * 14/37 = Rs. 2576/-**

10.

A, B and C enter into a partnership. A initially invests Rs.25 lakh and adds another Rs. 10 lakhs after one year. B invests Rs. 35 lakhs and withdraws Rs. 10 lakh after 2 years and C invests Rs. 30 lakh. In what ratio should the profits be divided at the end of 3 years?

**Answer: Option 'A'**

**1. Total length of the period = 3 years
Therefore investment of A = Rs. 25 lakhs × 1 + Rs. 35 lakhs = Rs. 95 lakhs
2. A adds after one year Rs. 10 lakhs
Therefore investment of B = Rs. 35 lakhs × 2 + Rs. 25 lakhs = Rs. 95 lakhs
3. B withdraws Rs. 10 lakhs after 2 years
4. Investment of C = Rs. 30 × 3 = Rs. 90 lakhs
5. Profit ratio = (95 : 95 : 90)/5 = 19 : 19 : 18**

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