Memory Based Question Paper asked RRB PO Prelim  9 September 2nd shift and 10 September 2017

519, 517, 509, 483, 403, ?

Difference of Difference: ×3

Answer: 241

 

27, 38, 51, 68, 87,?

Difference of Difference: 2, 4, 2, 4

Answer: 110

 

1094, 365, 122, 41, 14, ?

Logic:34×9, 33×9, 32×9, 31×9, 30×9

Answer: 5

 

7, 3, 2, 2, 4, ?

Logic: ×0.5-0.5, ×1-1, ×2-2, ×4-4, ×8-8

Answer: 24

 

1.5, 3.5, 10, 34, ?, 711

Logic:×1+2, ×2+3, ×3+4, ×4+5

Answer: 141

 

Puzzle 1:

Eight boxes A,B,C,D,J,K,L,M are arranged in a stack way. 3 boxes are kept in between A and J.there are As many boxes as in between c and J and c and A. There are 4 boxes in between k and B. K is immediately below C . There are 3 boxes in between M and D where D lies below M but not the Lowest. L does not lie immediately above J.

Solution:

M

B

L

A

D

C

K

J

 

Factorization based Questions :-

190, 94, 46, 22

 

5, 28, 47, 64, 77, ?

 

7, 4, 5, 12, 52, ?

 

89, 88, 85, 78, 63, ?

 

6, 4, 5, 11, 39, ?

Line Graph.

 

Quadratic Equations :-

x2- 8x + 15 = 0.

 

3y+22 – 11y + 10 = 0

 

y^2 = 16

 

x2 -7x + 12 = 0

 

3, 5, 13, 49, ?, 1441

A) 248

B) 295

C) 241

D) 374

E) 352

Option C

Pattern:

*2 – 1, *3 – 2, *4 – 3…….

 

0.5, 12, 52, 106, 107, ?

A) 54

B) 43

C) 34

D) 38

E) 46

Option A

Pattern:

*8 + 8, *4 + 4, *2 + 2, *1 +1, *0.5 + 0.5

 

39, 31, 41, 29, 43, ?

A) 24

B) 34

C) 27

D) 21

E) 35

Option C

Pattern:

-8, +10, -12, +14, -16

 

221, 109, 53, 25, 11, ?

A) 2

B) 6

C) 5

D) 4

E) 7

Option D

Pattern:

221 – 3 = 218, 218/2 = 109…………..

11 – 3 = 8, 8/2 = 4

 

131, 67, 35, 19, 11, ?

A) 4

B) 8

C) 5

D) 6

E) 7

Option D

Pattern:

131+3= 134, 134/2 = 67….

11+3 = 14, 14/2 = 7

 

Number Series

7, 6, 10, 27, 104, ?

a) 530

b) 493

c) 489

d) 515

e) 509

 

6, 4, 5, 11, 39, ?

a) 160

b) 193

c) 189

d) 183

e) 171

 

29, 15, 16, 34, 105, ?

a) 334

b) 444

c) 424

d) 347

e) 455

 

89, 88, 85, 78, 63, ?

a) 32

b) 30

c) 34

d) 27

e) 23

 

190, 94, 46, 22, ?, 4

a) 16

b) 10

c) 9

d) 13

e) 8

 

19, 9, 8, 14, 39, ?

a) 196

b) 152

c) 185

d) 106

e) 138

 

5, 28, 47, 64, 77, ?

a) 96

b) 98

c) 85

d) 106

e) 88

 

4, 46, 86, 122, 156, ?

a) 186

b) 244

c) 219

d) 197

e) 205

 

102, 101, 98, 91, 76, ?

a) 42

b) 40

c) 45

d) 37

e) 33

 

728, 242, 80, 26, ?, 2

a) 16

b) 10

c) 9

d) 13

e) 8

 

Number Series Answers:-

1. d

*1 – 1, *2 – 2, *3 – 3, *4 – 4, *5 – 5

 

2. c

*1 – 2, *2 – 3, *3 – 4, *4 – 5, *5 – 6

 

3. c

*0.5 + 0.5, *1 + 1, *2, +2, *3 + 3, *4 + 4

 

4. a

-1, -3, -7, -15, -31

 

5. b

190 – 2 = 188/2 = 94

94 – 2 = 92, 92/2 = 46

46 – 2 = 44, 44/2 = 22

22 – 2 = 20, 20/2 = 10

 

6. b

*0.5 – 0.5, *1 – 1, *2, – 2, *3 – 3, *4 – 4

 

7. e

+23, +19, +17, +13, +11

 

8. a

+42, +40, +36, +34, +30

 

9. c

-1, -3, -7, -15, -31

 

10. e

728 – 2 = 726, 726/3 = 242

242 – 2 = 240, 240/3 = 80

80 – 2 = 78, 78/3 = 26

26 – 2 = 24, 24/3 = 8