solution rrb 02[www.qmaths.in]

8/17/2019 SOLUTION RRB 02[Www.qmaths.in]

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2007, OUTRAM LINES, 1ST FLOOR, OPPOSITE MUKHERJEE NAGAR POLICE STATION, DELHI-110009

1. (B) P + A + N = PAN

16 + 1 + 14 = 31P + A + R = PAR 16 +1+18 = 35

P + A + T = PAT 16+1+ 20 = 37

2. (B) 72 = 4992 = 8182 = 64

102

= 1003. (A)

Suresh (father)

Deepak Naresh

(brother) Anu Ramesh (daughter) (brother) The uncle of Ramesh is Deepak.

4. (A) Opposite of Pleasure is sorrow, soopposite of right is wrong.

5. (D) The numbers 1, 3, 5 and 6 are on theadjacent faces of the number 2. So, 4 lies

opposite 2. From the two views of the dice,it is clear that 6 lies opposite of 1.

6. (B) The tree grows up from root in the sameway smoke comes from fire.

7. (A) Given that

WONDERF U L

Change according to alphabet

D E F L N O R U M

8. (C) only onedaughter

(Woman) mother father

man woman

(mother)

Woman is the mother of the man.9. (C) Birbal, Abul Fazl and Tansen were

included in Akbar’s Navratna but FaizAhmed was not a member of Navratna.

10. (B) 1980 is a leap year. The February willhave 29 days.26 January, 1980 Saturday 31 January, 1980 Thursday 1 February, 1980 Friday

29 February, 1980 Friday 3 March, 1980 Monday

Y’s birthday Friday

11. (D) Claims Wish Demand

RRB MOCK TEST-2 (Solution)

I. FalseII. False

12. (D)

Cars Cats

Fans

I. FalseII. False

13. (B)Windows

DoorsWall

I. FalseII. True

14. (A)

15. (D) N A T I O N E A R N

4 6 7 2 3 4 1 6 5 4

A T T E N T I O N

6 7 7 1 4 7 2 3 4

16. (D) The colour of milk is white. Here,white means yellow.

17. (D) Meaningful logical order :

5. Planning 2. Booking

3. Boarding

4. Travel

1. Destination

18. (D)

C

A E

K G

L F

M O

R

S

P

H

I

J

B N D

Q

The triangles are : ABL; BCD; DEF;

FGP; PGH; QHI; JQI; KRJ; LRK;

OSG; SGQ; SPI; SRI; KSQ; KMS; FGH; JHI; JKL; KSG; NEI; ANI; MCG; KCO; GMK; KOG; AEI; KCG Thus, there are 27 triangles.

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19. (A)F G B R

20. (B)

1 1 1

2 2 2

2 2 2

W K Y

A C E

B D F

Z

G

H

21. (D)

3 km

8 km

12 kmC E D

ABNorth

South

EastWest

AD = 2 2

AE ED

= 2 2

3 4

= 9 16 = 25 = 5 km22. (B) Litmus paper is used to test the

acidity. Similarly, test is conducted toassess knowledge.

23. (C) One writes with pen on paper. Pencilis related with paper in the same way.

24. (C) A is B’s sister.C is B’s mother. Therefore, C is also the mother of A.D is C’s father i.e. D is A’s mother’s father. Therefore, A is the grand-daughter of D.

25. (C) At 2 : 30, the hands of cl ocks

are171

2minutes apart.

Each minute angle equals

=360

60

= 6°

Now = 171

2 × 6° = 105°

26. (D) Let their monthly income are x and y respectively.

x + y = ` 7500 ...(1)Again, they spend 90% and 80% respecti-vely.So they save 10% and 20%.By question,

(10% of x ) : (20% of y ) = 3 : 4

10

10020

100

x

y =

3

4

10

20

x

y =

3

4

x =3

2y ...(2)

Putting the value of eq. (2) in eq. (1)

3

2y + y = 7500

5

2

y = 7500

y =7500 2

5

= ` 3000

x =3

2y =

3

2 × 3000 = ` 4500

27. (A) Let the both parts are x and y . x + y = 72 ...(1)By question,20% of x = 25% of y

20

100

x =

25

100

y

5

x =

4

y ...(2)

Putting the value of eq. (2) in eq. (1),

5

4y + y = 72

9

4

y = 72

y = 32

x = 72 – y = 72 – 32 = 40both parts = 40, 32.28. (C) Interest

=principle × time × rate

100(747 is amount)

747 – P =P 6 11

100

747 =66P

100 + 1 =

166P

100

P =747 100

166

= ` 450

29. (C) (a – b ) = 1 (a – b )3 = (1)3

a 3 – b 3 – 3ab (a – b ) = 1 a 3 – b 3 – 3ab × 1 = 1 a 3 – b 3 – 3ab = 1

30. (A) S.P. = 720, loss = 25%

So, C.P =

720 100

100 25

= ` 960

For 25% Profit, the S.P. will be 125% of `960

= 960 ×125

100 = ` 1200

31. (C) Let mean proportional is x So, 49 : x : : x : 64

49

x =

64

x

x 2 = 49 × 64 (x )2 = (7 × 8)2x = 56

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32. (D) Speed = 82.6 km/h,

time = 15 minute =15

60 hours

distance = speed × time

= 82.6 km/h ×15

60 h = 20.65 km

= 20.65 × 1000 m = 20650 m33. (A) Let the income of C = x .

income of B = 80% of x

=80

100

x =

4

5

x

income of A = 110% of4

5

x

110

100 ×

4

5

x

=

22

25

x

Ratio is,

22

25

x :

4

5

x : x = A : B : C

22

25

x :

20

25

x :25

25

x = A : B : C

A : B : C = 22 : 20 : 2534. (A) 8 men +12 children work in 9 days.

From question,1 men = 2 children6 men = 12 children.8 men +12 children= 8 men + 6 men = 14 men.

14 men complete a work in 9 days.1 man complete a work in 14 × 9 days

12 men complete a work in14 9

12

days

=21

2 = 10

1

2 days

35. (D) x = 7 – 4 3

1

x =

1

7 4 3

1

x =

7 4 3

7 4 3 7 4 3

=

22

7 4 3

7 4 3

=7 4 3

49 48

= 7 + 4 3

x +1

x = 7 – 4 3 + 7 + 4 3 = 14

36. (D) Remainder = 2 × 24 – 11 = 48 – 11 = 3737. (C) The pattern is :

1 × 22 = 1 × 4 = 4

2 × 32

= 2 × 9 = 183 × 42 = 3 × 16 = 48

4 × 52 = 4 × 25 = 1005 × 62 = 5 × 36 = 1806 × 72 = 6 × 49 = 294

38. (B) 2 12, 18, 21, 28

2 6, 9, 21, 14

3 3, 9, 21, 7

7 1, 3, 7, 7

1, 3, 1, 1

L.C.M. = 2 × 2 × 3 × 7 × 3 = 252 The smallest 5-digit number =10000

252 10000 39

756

2440

2268

172

Smallest number divisible by 252= 10000 + (252 - 172) = 10080Required number = 10081

39. (C) In the word ASSASSINATION.A comes thrice, S - four timesI twice and N-twice.We have to arrange AAA II NNTO (SSSS)Number of arrangements

=10!

3 2 2

=10!

24 = 151200

40. (A) Let the fraction isx

y .

By question,

10%of

20%of

x x

y y

=9

20

10

100

20

100

x x

y y

=9

20

9

106

5

x

y =

9

20

9

10

x ×

5

6y =

9

20

x

y =

9 10 6

9 5 20

=

3

541. (D) Let the breadth of hall = x m

length = (x + 5) m,area of hall = 750 m2

l × b = 750 m2

(x + 5)x = 750 x 2 + 5x – 75O = 0 x 2 + 30x – 25x – 750 = 0 (x + 30) (x – 25) = 0x = 25, –30

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x = – 30 is not possiblex = 25 m.length = (x + 5) m= (25 + 5) m = 30 m

42. (C) From formula,

1 1

1

M T

W =

2 2

2

M T

W

(Let Required rupees = W2)

6 8

8400

=

2

9 6

W

W2 =9 6 8400

6 8

= ` 9450

43. (C) ? =0.01 0.0064

0.01 0.3

=0.01 0.08

0.003

=

0.09

0.003

=0.3

0.003 = 100

44. (A) Total amount of the bill = ` x

3

15

x

= 400

2

5

x = 400

x =400 5

2

= ` 1000

45. (A)1

11

11

x

= 2

1

11

1x

x

= 2

1

11

x

x

= 2

1

1

1

x x

x

= 2 1

2 1

x

x

= 2

4x + 2 = x + 1

4x – x = 1 – 2 3x = –1

x = – 13

46. (C) Ratio of the share of profit between P

and Q

= (600 × 4 ) : (800 × 2)= 2400 : 1600

= 3 : 2

47. (D) 20% of 200 =20 200

100

= 40

7% of 500 =7 500

100

= 35

1300% of 3 =1300 3

100

= 39

600% of 7 =

600 7

100

= 42

48. (A) Reqd % =221

4933 × 100 = 4.48 4.5%

49. (B) Difference =1

5 {1542 - 1382} + (1545 –

1384) + (1550 – 1275) + (1570 – 1300) + (1580

– 1290)}

=1

5 {160 + 161 + 275 + 270 + 290}

=1

5 × 1156 = 231.2 231

50. (D) Reqd ratio =5825

5625 =

233

225 = 233 : 225

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1. (B)

2. (B)

3. (A)

4. (A)

5. (D)

6. (B)

7. (A)

8. (C)9. (C)

10. (B)

11. (D)

12. (D)

13. (B)

14. (A)

15. (D)

16. (D)

17. (D)

18. (D)19. (A)

20. (B)

21. (D)

22. (B)

23. (C)

24. (C)

25. (C)

RRB MOCK TEST-2 (ANSWER KEY)

26. (D)

27. (A)

28. (C)

29. (C)

30. (A)

31. (C)

32. (D)

33. (A)34. (A)

35. (D)

36. (D)

37. (C)

38. (B)

39. (C)

40. (A)

41. (D)

42. (C)

43. (C)44. (A)

45. (A)

46. (C)

47. (D)

48. (A)

49. (B)

50. (D)

51. (A)

52. (A)

53. (D)

54. (C)

55. (C)

56. (B)

57. (B)

58. (B)59. (B)

60. (D)

61. (D)

62. (B)

63. (B)

64. (A)

65. (A)

66. (B)

67. (B)

68. (D)69. (C)

70. (D)

71. (D)

72. (B)

73. (B)

74. (D)

75. (D)

76. (D)

77. (A)

78. (B)

79. (B)

80. (B)

81. (C)

82. (A)

83. (C)84. (D)

85. (B)

86. (A)

87. (D)

88. (C)

89. (C)

90. (C)

91. (A)

92. (D)

93. (A)94. (A)

95. (B)

96. (D)

97. (D)

98. (A)

99. (B)

100. (B)

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