“20-20” Quantitative Aptitude | Crack SBI PO Prelims 2018 Day-134

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“20-20” Aptitude Questions | Crack SBI PO Prelims 2018 Day-134

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Directions (Q. 1 – 5): What value should come in the place of question mark (?) in the following number series?

  1. 256, 263, 312, 655, ?
  1. 1078
  2. 2154
  3. 2892
  4. 3056
  5. 1590 
  1. 2, 3, 24, 605, ?
  1. 29638
  2. 25746
  3. 21890
  4. 15434
  5. 12782 
  1. 172, 199, 229, 264, 306, 359, ?
  1. 386
  2. 412
  3. 454
  4. 370
  5. 425 
  1. 616, 612, 602, 574, 492, ?
  1. 312
  2. 326
  3. 248
  4. 295
  5. 354 
  1. 45, 86, 267, 1052, 5285, ?
  1. 28742
  2. 31674
  3. 33586
  4. 35420
  5. 26728 

Directions (Q. 6 – 10): What approximate value should come in the place of question mark (?) in the following questions?

6. ? = 354.9 + (219 ÷ 3 × 6.99)

a. 752

b. 698

c. 734

d. 866

e. 820 

  1. 11.75 × 5.05 + (38.01)2 ÷ 18.91 =?
  1. 136
  2. 145
  3. 158
  4. 170
  5. 184 
  1. 525.92 – 285.21 ÷ (9.97 % of 192) =?
  1. 450
  2. 620
  3. 580
  4. 700
  5. 510 
  1. ? – (3/11) of (33/25) of 2926 = 278
  1. 1450
  2. 1330
  3. 1680
  4. 1720
  5. 1960 
  1. √20735 ÷ 9 + (38.01)2 = 100 +?
  1. 1450
  2. 1630
  3. 1360
  4. 1840
  5. 1580
  1. If the difference between the simple interest and Compound interest on a certain sum for 2 years at 6 % is Rs. 50.40. Find the sum?
  1. Rs. 14000
  2. Rs. 22000
  3. Rs. 26000
  4. Rs. 18000
  5. None of these
  1. The salary of A is 25 % less than B while the salary of C is 30% more than the salary of B, then find the total salary of A, B and C, if B’s salary is Rs. 40000?
  1. Rs. 154800
  2. Rs. 144200
  3. Rs. 175000
  4. Rs. 122000
  5. None of these
  1. A box contains 4 red balls, 3 white balls, 2 black balls and 5 pink balls. If four balls are drawn out random, then the probability of getting at least one pink ball?
  1. 96/103
  2. 125/143
  3. 134/157
  4. 112/125
  5. None of these
  1. If the price of the milk be increased by 20 %, then find by how much percentage does the house owner must reduce consumption of milk so as not to increase his expenditure?
  1. 15 7/8 %
  2. 14 2/5 %
  3. 16 2/3 %
  4. 17 ½ %
  5. None of these 
  1. The population of a town increases at the rate of 4 % every year. The present population is 15625. When will it be 17576?
  1. 3 years
  2. 2 years
  3. 4 years
  4. 1 year
  5. None of these

Directions (Q. 16 – 20) Study the following information carefully and answer the given questions:

Following pie chart shows the total number of students in 6 different colleges.

  1. Find the average number of students in college P, Q and S together?
  1. 700
  2. 650
  3. 850
  4. 900
  5. None of these 
  1. Find the difference between the total number of students in college Q and R together to that of the college S and U together?
  1. 1000
  2. 1050
  3. 1150
  4. 1200
  5. None of these 
  1. If 15 % and 20 % of students are going to symposium in college S and T respectively, then find the total number of students didn’t go to any symposium from both the colleges together?
  1. 1230
  2. 1570
  3. 1340
  4. 1450
  5. None of these 
  1. The ratio of male and female students in College R and T is 3: 2 and 1: 2 respectively, then find the difference between the total number of male and female from both the colleges together?
  1. 150
  2. 200
  3. 180
  4. 100
  5. 230 
  1. Total number of students in college Q is what percentage of total number of students in college R?
  1. 100 %
  2. 120 %
  3. 110 %
  4. 150 %
  5. 140 %

Answer:

Directions (Q. 1 – 5):

1). Answer d

The pattern is, +71, +72, +73, +74,..

The answer is, 3056

2). Answer a

The pattern is, *12 +1, *32 -3, *52 +5, *72 -7,..

The answer is, 29638

3). Answer e

The difference of difference is, 3, 5, 7, 11, 13,.. (Prime no’s)

The answer is, 425

4). Answer c

The pattern is, – (31 +1), -(32 +1), -(33 +1), -(34 +1), -(35 +1),..

The answer is, 248

(Or)

The difference of difference of difference is, *3

The answer is, 248

5). Answer b

The pattern is, *2 -22, *3 +32, *4 – 42, *5 + 52, *6 – 62,..

The answer is, 31674

Direction (6-10)

6). Answer d

X = 355 + (219/3)*7

X = 355 + 511

X = 866

7). Answer a

(12*5) + (38*38)/19 = x

X = 60 + 76

X = 136

8). Answer e

525 – 285 ÷ [(10/100)*192] = x

525 – (285/19) = x

X = 525 – 15 = 510

9). Answer b

X – (3/11)*(33/25)*2925 = 278

X – 1053 = 278

X = 1053 + 278

X = 1331 = 1330

10). Answer c

√20736 ÷ 9 + (38)2 = 100 +?

(144/9) + 1444 -100 = x

X = 16 + 1444 – 100

X = 1360

11). Answer a

Diff = Sum*(r/100)2

50.40 = Sum*(6/100)2

50.40*100*100/36 = Sum

Sum = Rs. 14000

12). Answer d

The salary of A to B = 75: 100 = 3: 4

The salary of B to C = 100: 130 = 10: 13

The salary of A, B and C = 15: 20: 26

B’s salary = Rs. 40000

20’s = 40000

1’s = 2000

Total salary = 61’s = 61*2000 = Rs. 122000

13). Answer b

P(E) = n(E)/n(S)

n(S) = 14C4

Probability of getting at least one pink ball,

Required probability = 1 – none is pink ball

P(None is pink ball)

= > 9C4

P(E) = 9C4/ 14C4

P(E) = 18/143

Required probability = 1- (18/143) = 125/143

14). Answer c

Required percentage = [R/(100 + R)]*100 [Here R = 20 %]

= > (20/120)*100

= > 50/3 % = 16 2/3 %

15). Answer a

15625*(1 + 4/100)n = 17576

(104/100)n = (17576/15625)

(26/25)n = (26/25)3

n = 3 years

After 3 years, the population will be 17576.

Direction (16-20)

16). Answer c

The average number of students in college P, Q and S together

= > (15 + 24 + 12)*(5000/100)*(1/3)

= > 850

17). Answer b

The total number of students in college Q and R together

= > (24 + 20)*(5000/100)

The total number of students in college S and U together

= > (12 + 11)*(5000/100)

Required difference = (5000/100)*(44 – 23)

= > 50*21 = 1050

18). Answer a

The total number of students didn’t go to any symposium from both the colleges together

= > (12/100)*5000*(85/100) + (18/100)*5000*(80/100)

= > 510 + 720 = 1230

19). Answer d

The ratio of male and female students in College R = 3: 2

The ratio of male and female students in College T = 1: 2

Total number of male in college R and T together

= > (20/100)*5000*(3/5) + (18/100)*5000*(1/3)

= > 600 + 300 = 900

Total number of female in college R and T together

= > (20/100)*5000*(2/5) + (18/100)*5000*(2/3)

= > 400 + 600 = 1000

Required difference = 1000 – 900 = 100

20). Answer b

Required % = (24/20)*100 = 120 %

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Quantitative Aptitude “20-20” 11.00 AM
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