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Question 1 of 10

1. Question

1 points

Category: Quantitative Aptitude

A mixture of acid and water in a container comprises 12 litre of acid. If 8 litre of pure acid and 3 litre of pure water were added to this container, the percentage of water in the new mixture would be 20%. What was the initial quantity of water in the container?.

Correct

Answer – 3) 2L
Explanation:
Initial acid =12L water =X
Mixture =12 : X
(X+3)/(23+X)=20/100=1/5
X=2

Incorrect

Answer – 3) 2L
Explanation:
Initial acid =12L water =X
Mixture =12 : X
(X+3)/(23+X)=20/100=1/5
X=2

Question 2 of 10

2. Question

1 points

Category: Quantitative Aptitude

A bucket contain 30 cups which are numbered from 1 to 30. If two cups are drawn at random then what is the probability that both numbers are prime?

Correct

Answer – 3) 3/29
Explanation:
From 1 to 30 prime number = 2,3,5,7,11,13,17,19,23,29
Required probability = 10C2/30C2=3/29

Incorrect

Answer – 3) 3/29
Explanation:
From 1 to 30 prime number = 2,3,5,7,11,13,17,19,23,29
Required probability = 10C2/30C2=3/29

Question 3 of 10

3. Question

1 points

Category: Quantitative Aptitude

In November, David spent 45% of his monthly salary on paying bill and rent. Out of the remaining salary, he invested 60% in Mutual Fund and the remaining he deposited in bank. He deposited Rs 15400 in bank. If in December, he got an increment of 10%, what was his salary in December?

Correct

Answer – 2) 77000
Explanation:
Let the monthly salary in November =100
Amount spent on paying bill and rent= 45%
Remaining amount =55%
Amount invested in Mutual Fund=55 * 60/100=33 %
Now remaining amount = 100-(45+33)=22 %
22% = 15400
100% = 15400 * 100/22= 70000
Required monthly salary in December =70000 * (110/100)=77000

Incorrect

Answer – 2) 77000
Explanation:
Let the monthly salary in November =100
Amount spent on paying bill and rent= 45%
Remaining amount =55%
Amount invested in Mutual Fund=55 * 60/100=33 %
Now remaining amount = 100-(45+33)=22 %
22% = 15400
100% = 15400 * 100/22= 70000
Required monthly salary in December =70000 * (110/100)=77000

Question 4 of 10

4. Question

1 points

Category: Quantitative Aptitude

Cost price(CP) of each of the bags P & Q is Rs X. Bag P was sold at a profit of 10% and the Bag Q was sold at a profit of 30%. If the overall profit earned after selling both the bags is Rs 136, what is the value of “X”.

A watercraft which has a speed of 30 kmph in still water goes 60 km downstream and comes back in a total of 4 hours 30 minutes. What is the speed of the stream?

Correct

Answer – 1) 10 kmph
Explanation:
Let the speed of stream = X kmph
Downstream speed = 30+X
Upstream speed = 30-X
60/(30+X) + 60/(30-X)=9/2
X=10 kmph

Incorrect

Answer – 1) 10 kmph
Explanation:
Let the speed of stream = X kmph
Downstream speed = 30+X
Upstream speed = 30-X
60/(30+X) + 60/(30-X)=9/2
X=10 kmph

Question 6 of 10

6. Question

1 points

Category: Quantitative Aptitude

If suresh walks at 28 kmph instead of 20 kmph, he would have walked 20 km more. The actual distance travelled by him is?

Correct

Answer – 1) 50 km
Explanation:
Let the original distance X km
(X/20) = (X+20)/28
X=50 km

Incorrect

Answer – 1) 50 km
Explanation:
Let the original distance X km
(X/20) = (X+20)/28
X=50 km

Question 7 of 10

7. Question

1 points

Category: Quantitative Aptitude

Trains starting at the same time from two stations 500 km apart and going in opposite directions cross each other at a distance of 210 km from one of the stations. What is the ratio of their speeds?

Correct

Answer – 2) 21:29
Ratio of their speed = 210 : (500-210) = 210 : 290 = 21:29

Incorrect

Answer – 2) 21:29
Ratio of their speed = 210 : (500-210) = 210 : 290 = 21:29

Question 8 of 10

8. Question

1 points

Category: Quantitative Aptitude

In a finance company, a scheme named Silver offered the SI at the rate of 6% p.a received on a principal of Rs X was Rs 482.40 when invested for 3 years. If Gold Scheme offered CI at 20% p.a, what was the interest received by investing Rs (X-680) for 2 years in Gold Scheme?

Correct

Answer – 5) 880
Explanation:
482.40 * 100 = P * 6 *3
P = Rs 2680
In Gold Scheme, Principal will be (2680-680)= 2000
In Gold Scheme,
Total amount = (2000 *120 *120)/(100 *100)
= 2880
Interest = (2880-2000)= Rs 880

Incorrect

Answer – 5) 880
Explanation:
482.40 * 100 = P * 6 *3
P = Rs 2680
In Gold Scheme, Principal will be (2680-680)= 2000
In Gold Scheme,
Total amount = (2000 *120 *120)/(100 *100)
= 2880
Interest = (2880-2000)= Rs 880

Question 9 of 10

9. Question

1 points

Category: Quantitative Aptitude

In a hall, three staffs weighing 75 kg, 71 kg and 63 kg respectively leave the hall and are replaced. By three staffs weighing 47kg, 49kg and 53 kg respectively. As a result, the average weight of the hall decreased by 1.25 kg. How many staffs are there in the hall ?

Correct

Answer – 1) 48
Explanation:
Difference of weight among three staffs = (75+71+63)-(47+49+53) = 60 kg
Let total number of staffs = X
60/X= 1.25
X = 48

Incorrect

Answer – 1) 48
Explanation:
Difference of weight among three staffs = (75+71+63)-(47+49+53) = 60 kg
Let total number of staffs = X
60/X= 1.25
X = 48

Question 10 of 10

10. Question

1 points

Category: Quantitative Aptitude

Amit, Banu, Chand each working alone, can finish a piece of work in 27, 33 and 45 days respectively. Amit starts by working alone for 12 days, then Banu takes over from Amit and works for 11 days. At this stage Chand takes over from Banu and complete the remaining work. In how many days the whole work was completed?

Correct

Answer –2) 33 days
Explanation:
Chand can finish the remaining work in X days
12/27 + 11/33 + X/45= 1
X = 10
Time taken by Amit, Banu and Chand together to complete the whole work = 12+11+10 = 33 days

Incorrect

Answer –2) 33 days
Explanation:
Chand can finish the remaining work in X days
12/27 + 11/33 + X/45= 1
X = 10
Time taken by Amit, Banu and Chand together to complete the whole work = 12+11+10 = 33 days

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