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Question 1 of 10

1. Question

1 points

Category: Quantitative Aptitude

A and B can complete a work in 7 days and 8 days respectively. They undertook to do a job for Rs 1400. Now with the help of C they did in 3 days. What will C get as his share?

Correct

Explanation:
1/7 + 1/8 + 1/x = 1/3
So x = 168/11 days, C can do in 168/11 days
So money will be shared in ratio 1/7 : 1/8 : 11/168 = 24 : 21 : 11
So C wil get = 11/56 * 1400

Incorrect

Explanation:
1/7 + 1/8 + 1/x = 1/3
So x = 168/11 days, C can do in 168/11 days
So money will be shared in ratio 1/7 : 1/8 : 11/168 = 24 : 21 : 11
So C wil get = 11/56 * 1400

Question 2 of 10

2. Question

1 points

Category: Quantitative Aptitude

Station A and B are 160 km apart. First train started from A at 7 AM at speed of 50 km/hr. Second train started from B at 8 AM at speed of 60 km/hr. At what time will both meet?

Correct

Explanation:
After 1 hr, i.e at 8 AM, first train has covered 50 km
So now distance between both trains = 160-50 = 110km
So time of meeting will be 8 AM + 110/(50+60) = 8 AM + 1hr = 9AM

Incorrect

Explanation:
After 1 hr, i.e at 8 AM, first train has covered 50 km
So now distance between both trains = 160-50 = 110km
So time of meeting will be 8 AM + 110/(50+60) = 8 AM + 1hr = 9AM

Question 3 of 10

3. Question

1 points

Category: Quantitative Aptitude

A circle of area equal to 9ᴨ cm sq. is inscribed in a square. What will be the area of square?

Correct

Explanation:
r^{2} = 9ᴨ
so r = 3 cm
so diameter = 6 cm = side of square
so area of square = 6*6

Incorrect

Explanation:
r^{2} = 9ᴨ
so r = 3 cm
so diameter = 6 cm = side of square
so area of square = 6*6

Question 4 of 10

4. Question

1 points

Category: Quantitative Aptitude

What must be added to 1/x to make it equal to x?

Correct

Explanation:
Let y must be added to 1/x
So y + (1/x) = x
So y = x – 1/x = (x^2-1)/x

Incorrect

Explanation:
Let y must be added to 1/x
So y + (1/x) = x
So y = x – 1/x = (x^2-1)/x

Question 5 of 10

5. Question

1 points

Category: Quantitative Aptitude

Selling price of an article is set at Rs 27,500. If it was sold at 10% less, then also there would have a profit of 10%. What is the actual cost price of the article?

A and B invested Rs 400 and Rs 550. After 4 months, A added Rs 200 and B withdrawn Rs 100. If after a year a total profit of Rs 3050 is made, what is the share of A in the profit?

There are 900 boys and 800 girls in a school. 60% of the boys and 80% of the girls passed in an examination. What is the approximate percentage of students who did not pass that exam?

Correct

Explanation:
Boys who dint pass = (40/100)*900 = 360
Girls who dint pass = (20/100)*800 = 160
Total who dint pass = 360+160 = 520 out of total 900+800 = 1700 students
So required % = (520/1700)*100

Incorrect

Explanation:
Boys who dint pass = (40/100)*900 = 360
Girls who dint pass = (20/100)*800 = 160
Total who dint pass = 360+160 = 520 out of total 900+800 = 1700 students
So required % = (520/1700)*100

Question 8 of 10

8. Question

1 points

Category: Quantitative Aptitude

In 2014, number of students in a school increased by 20% than the previous year. If the number of students in 2013 and 2015 are equal, what is the percentage decrease in the number of students in 2015 than the previous year?

Correct

Explanation:
Shortcut:
There is increase of 20%, and now we have to make again the same value as before increase, so (20/(100+20)] * 100 = 20/120 * 100 = 50/3%
OR
In 2013 = x, in 2014 = (120/100)*x = 6x/5
In 2015 = x
So percentage decrease in 2015 = [(6x/5 – x)/ (6x/5)] * 100 = 50/3%

Incorrect

Explanation:
Shortcut:
There is increase of 20%, and now we have to make again the same value as before increase, so (20/(100+20)] * 100 = 20/120 * 100 = 50/3%
OR
In 2013 = x, in 2014 = (120/100)*x = 6x/5
In 2015 = x
So percentage decrease in 2015 = [(6x/5 – x)/ (6x/5)] * 100 = 50/3%

Question 9 of 10

9. Question

1 points

Category: Quantitative Aptitude

The cost of material is divides in its raw materials, labour cost and transportation in the ratio 3 : 6 : 4. If the labour cost on the making of material was Rs 4800, what is the cost of material?

Correct

Explanation:
3 : 6 : 4
So 6/(3+6+4) * x = 4800
So, x = 10400

Incorrect

Explanation:
3 : 6 : 4
So 6/(3+6+4) * x = 4800
So, x = 10400

Question 10 of 10

10. Question

1 points

Category: Quantitative Aptitude

If 3x + 5y = 35 and 5x + 2y = 33, then 4x + 7y equals

Correct

Explanation:
Solve 3x + 5y = 35 and 5x + 2y = 33 gives, x = 5, y = 4
So 4x + 7y = 4*5 + 7*4

Incorrect

Explanation:
Solve 3x + 5y = 35 and 5x + 2y = 33 gives, x = 5, y = 4
So 4x + 7y = 4*5 + 7*4