# IBPS RRB PO Prelims Quantitative Aptitude Questions 2019 (Day-02)

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[WpProQuiz 6515]

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

1) 1290, 645, 430, ? , 258, 215

a) 322.5

b) 356

c) 334

d) 342.5

e) 308

2) 218, 270, 333, 409, 500, ?

a) 712

b) 686

c) 730

d) 608

e) 654

3) 52, 274, 404, 472, 502, ?

a) 536

b) 512

c) 554

d) 580

e) 608

4) 11, 22, 66, ? , 2310, 25410

a) 360

b) 420

c) 330

d) 450

e) 480

5) 126, 64, 72, 171, ? , 6109

a) 652

b) 576

c) 924

d) 1032

e)748

Directions (Q. 6 â€“ 10): Study the following information carefully and answer the given questions:

The following table shows the total population of 5 different villages and the ratio of males to females among them.

6) Find the ratio between the total female population in village A to that of village C?

a) 5 : 6

b) 7 : 8

c) 1 : 2

d) 3 : 4

e) None of these

7)Total population in village B and C together is what percentage of total population in village D and E together?

a) 72 %

b) 76 %

c) 84 %

d) 88 %

e) None of these

8) Find the difference between the total population in village A to that of total male population in village B and E together?

a) 34000

b) 38000

c) 42000

d) 46000

e) None of these

9) Find the average male population in village B, C and E together?

a) 58000

b) 60000

c) 64000

d) 56000

e) None of these

10) Find the difference between the average male population of village B, C and E together to that of the average female population of village A, C and E together?

a)14000

b) 10000

c) 16000

d) 12000

e) None of these

Directions (1-5):

1290*(1/2) = 645

645*(2/3) = 430

430*(3/4) = 322.5

322.5*(4/5) = 258

258*(5/6) = 215

The difference of difference is, 11, 13, 15, 17,…

52 + 63 + 6 = 274

274 + 53 + 5 = 404

404 + 43 + 4 = 472

472 + 33 + 3 = 502

502 + 23 + 2 = 512

1*2 = 22

22*3 = 66

66*5 = 330

330*7 = 2310

2310*11 = 25410

126*0.5 + 13 = 64

64*1 + 23 = 72

72*2 + 33 = 171

171*4 +43 = 748

748*8 + 53 = 6109

Directions (6-10):

The total female population in village A

= >80000*(9/20) = 36000

The total female population in village C

= >120000*(2/5) = 48000

Required ratio = 36000 : 48000 = 3 : 4

Total population in village B and C together

= >90000 + 120000 = 210000

Total population in village D and E together

= >100000 + 150000 = 250000

Required % = (210000/250000)*100 = 84 %

The total population in village A = 80000

The total male population in village B and E together

= >[90000*(2/5)] + [150000*(13/25)]

= >36000 + 78000 = 114000

Required difference = 114000 â€“ 80000 = 34000

The average male population in village B, C and E together

= >[90000*(2/5) + 120000*(3/5) + 150000*(13/25)]/3

= > [36000 + 72000 + 78000]/3

= > 62000

The average male population of village B, C and E together

= >[90000*(2/5) + 120000*(3/5) + 150000*(13/25)]/3

= > [36000 + 72000 + 78000]/3

= > 62000

The average female population of village A, C and E together

= >[80000*(9/20) + 120000*(2/5) + 150000*(12/25)]/3

= > [36000 + 48000 + 72000]/3

= > 52000

Required difference = 62000 â€“ 52000 = 10000