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Question 1 of 10
1. Question
1 pointsCategory: Quantitative Aptitude1, 2, 3, 7, 15, 24, 51, ?
Correct
Explanation:
+1^2, +1^3, +2^2, +2^3, +3^2, +3^3, +4^2,Incorrect
Explanation:
+1^2, +1^3, +2^2, +2^3, +3^2, +3^3, +4^2, 
Question 2 of 10
2. Question
1 pointsCategory: Quantitative Aptitude2, 10, 25, 54, 104, ?
Correct
Explanation:
Double difference series as
102=8, 2510=15, 5425=29, 10454=50
Again difference – 158=7, 2915=14, 5029=21 so next difference is 7*4 = 28
So 50+28+104Incorrect
Explanation:
Double difference series as
102=8, 2510=15, 5425=29, 10454=50
Again difference – 158=7, 2915=14, 5029=21 so next difference is 7*4 = 28
So 50+28+104 
Question 3 of 10
3. Question
1 pointsCategory: Quantitative Aptitude11, 6, 7, 12, 26, ?
Correct
Explanation:
11*0.5 + 0.5, 6*1 + 1, 7*1.5 + 1.5, 12*2 + 2, 26*2.5 + 2.5Incorrect
Explanation:
11*0.5 + 0.5, 6*1 + 1, 7*1.5 + 1.5, 12*2 + 2, 26*2.5 + 2.5 
Question 4 of 10
4. Question
1 pointsCategory: Quantitative Aptitude3, 3, 5, 15, 69, ?
Correct
Explanation:
*2 – 3, *3 – 4, *4 – 5, *5 – 6Incorrect
Explanation:
*2 – 3, *3 – 4, *4 – 5, *5 – 6 
Question 5 of 10
5. Question
1 pointsCategory: Quantitative Aptitude2, 6, 20, 83, 412, ?
Correct
Explanation:
2*2 +2 = 6
6*3 +2 = 20
20*4 +2 = 82
82*5 + 2Incorrect
Explanation:
2*2 +2 = 6
6*3 +2 = 20
20*4 +2 = 82
82*5 + 2 
Question 6 of 10
6. Question
1 pointsCategory: Quantitative AptitudeA box contains 2 blue, 3 green and 5 red balls. If three balls are drawn at random, what is the probability that all balls are different in color?
Correct
Explanation:
Total balls = 10
So prob. = ^{2}C_{1}×^{3}C_{1}×^{5}C_{1} / ^{10}C_{3}Incorrect
Explanation:
Total balls = 10
So prob. = ^{2}C_{1}×^{3}C_{1}×^{5}C_{1} / ^{10}C_{3} 
Question 7 of 10
7. Question
1 pointsCategory: Quantitative AptitudeRice is bought at the rate of Rs 20 per kg. Out of the total quantity of 150 kg, 60 kg of rice is sold at 10% profit. At what rate per kg the remaining need rice need to be sold so that there is a profit of 25% on the total price?
Correct
Explanation:
Let remaining (15060) = 90 kg at x%. So by allegation method,
(60 kg)…………………(90 kg)
10% …………………….x%
…………….25%
(x25)…………..………15
So (x25)/15 = 60 kg/90 kg
Solve, x = 35%
90 kg costs = 90*10 = Rs 900
So at 35% profit SP of 90 kg is (135/100) * 900 = Rs 1215
So SP of 1 kg = 1215/90 = 13.5
OR
(60/150)*10 + (90/150)*x = 25
Solve, x = 35%, since its positive so profit
90 kg costs = 90*10 = Rs 900
So at 35% profit SP of 90 kg is (135/100) * 900 = Rs 1215
So SP of 1 kg = 1215/90 = 13.5Incorrect
Explanation:
Let remaining (15060) = 90 kg at x%. So by allegation method,
(60 kg)…………………(90 kg)
10% …………………….x%
…………….25%
(x25)…………..………15
So (x25)/15 = 60 kg/90 kg
Solve, x = 35%
90 kg costs = 90*10 = Rs 900
So at 35% profit SP of 90 kg is (135/100) * 900 = Rs 1215
So SP of 1 kg = 1215/90 = 13.5
OR
(60/150)*10 + (90/150)*x = 25
Solve, x = 35%, since its positive so profit
90 kg costs = 90*10 = Rs 900
So at 35% profit SP of 90 kg is (135/100) * 900 = Rs 1215
So SP of 1 kg = 1215/90 = 13.5 
Question 8 of 10
8. Question
1 pointsCategory: Quantitative AptitudeAmit is two and a half times more efficient than Baban. If Amit alone can complete a work in 20 days, then what portion of total work can both of them together complete in 7 days?
Correct
Explanation:
Let efficiency of B is x, then of A is 1 + 2 (1/2) = 7x/2
Ratio of efficiencies of A : B = 7x/2 : x= 7 : 2
So ratio of number of days of A : B = 2 : 7
A completes work in 10 days, so 2x = 20, x = 10
So B alone completes work in 7x days = 70 days
(A+B)’s 1 day’s work = 1/20 + 1/70 = 9/140
So in 7 days, pat of work completed is 7 * (9/140)Incorrect
Explanation:
Let efficiency of B is x, then of A is 1 + 2 (1/2) = 7x/2
Ratio of efficiencies of A : B = 7x/2 : x= 7 : 2
So ratio of number of days of A : B = 2 : 7
A completes work in 10 days, so 2x = 20, x = 10
So B alone completes work in 7x days = 70 days
(A+B)’s 1 day’s work = 1/20 + 1/70 = 9/140
So in 7 days, pat of work completed is 7 * (9/140) 
Question 9 of 10
9. Question
1 pointsCategory: Quantitative AptitudeIn rowing to a certain distance it takes three fourth time in moving downstream than upstream. What is the ratio of the rate of boat in still water to the rate of current?
Correct
Explanation:
Shortcut:
Let downstream time = 3t/4 and then upstream time = t
B = [t_{u} + t_{d}] / [t_{u} – t_{d}] * R
B = [t+ 3t/4] / [t 3t/4] * R
B/R = 7/1Incorrect
Explanation:
Shortcut:
Let downstream time = 3t/4 and then upstream time = t
B = [t_{u} + t_{d}] / [t_{u} – t_{d}] * R
B = [t+ 3t/4] / [t 3t/4] * R
B/R = 7/1 
Question 10 of 10
10. Question
1 pointsCategory: Quantitative AptitudeThe present population of a town is 1,38,240. If from last three years the population first increased at the rate of 20% for first years and then decreased by 20% in the third year, what was the population of town three years ago?
Correct
Explanation:
x * 120/100 * 120/100 * 80/100 = 138240
Solve, find xIncorrect
Explanation:
x * 120/100 * 120/100 * 80/100 = 138240
Solve, find x
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