# SBI Clerk Mains Quantitative Aptitude (Day-71

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Wrong number series

Directions (1 – 4): Find the wrong number in the given series and give the correct number as your answer.

1) 12, 15, 22, 41, 79, 157

A) 20

B) 21

C) 23

D) 24

E) Series is right

2) 1200, 720, 360, 144, 40.2, 8.64

A) 43.2

B) 42.4

C) 41.8

D) 44.6

E) None will replace the wrong number

3) 18.6, 101, 142.2, 162.8, 172.4, 178.25

A) 168.5

B) 170.4

C) 173.1

D) 178.6

E) 174.3

4) 36, 124, 201, 267, 320, 366

A) 280

B) 308

C) 314

D) 322

E) 348

Approximation

Direction (05-08): What is the approximate value should come in place of question mark in the following questions?

5) 39.912 % of 79.908 + âˆš3970.12 * 4.897 â€“ 12.190 * 7.198=?

A) 263

B) 267

C) 271

D) 277

E) 281

6) 1899.981 Ã· âˆš1444.12 – 119.910 % of 34.975 + 4.932 * 104.292=?

A) 521

B) 528

C) 537

D) 533

E) 546

7) 83.339 % of 102.198 + 45.4545 % of 186.978 + ? =49.912 * 3.189

A) -10

B) -15

C) -20

D) -5

E) -25

8) 174.879 + ? * 43.134 = 194.972 % of 199.894

A) 2

B) 5

C) 8

D) 11

E) 0

Directions (09-10): In the following questions, two equations I and II are given. You have to solve both equations and give answer as,

a) If x>y

b) If xâ‰¥y

c) If x<y

d) If xâ‰¤y

e) If x=y or the relation cannot be established.

9)

I) x2+ 46x + 493=0

II) 2y2+ 64y + 510=0

10)

I) 2x2â€“ 42x + 216=0

II) y2â€“ 26y + 168=0

Directions (1-4) :

12 * 2 â€“ 9=15

15 * 2 â€“ 7=23

23 * 2 â€“ 5=41

41 * 2 â€“ 3=79

79 * 2 â€“ 1=157

The wrong number is 22

1200 * 0.6=720

720 * 0.5=360

360 * 0.4=144

144 * 0.3=43.2

43.2 * 0.2=8.64

The wrong number is 40.2

18.6 + 82.4=101

101 + 41.2=142.2

142.2 + 20.6=162.8

162.8 + 10.3=173.1

173.1 + 5.15=178.25

The wrong number is 172.4

36 + 88=124

124 + 77=201

201 + 66=267

267 + 55=322

322 + 44=366

The wrong number is 320

Directions (5-8) :

39.912 % of 79.908 + âˆš3970.12 * 4.897 â€“ 12.190 * 7.198=?

40% of 80 + âˆš3969 * 5 â€“ 12 * 7 = ?

32 + 315 â€“ 84=?

263=?

1899.981 Ã· âˆš1444.12 – 119.910 % of 34.975 + 4.932 * 104.292=?

1900 Ã· âˆš1444 â€“ 120% of 35 + 5 * 104 = ?

50 â€“ 42 + 520=?

528=?

83.339 % of 102.198 + 45.4545 % of 186.978 + ? =49.912 * 3.189

5/6 * 102 + 5/11 * 187 + ? = 50 * 3

85 + 85 + ? =150

?=- 20

174.879 + ? * 43.134 = 194.972 % of 199.894

175 + ? * 43 = 195% of 200

175 + ? * 43=390

?=5

Directions (9-10) :

x2Â + 46x + 493=0

x2Â + 29x + 17x + 493=0

x(x + 29) + 17(x + 29)=0

(x + 17)(x + 29)=0

x=-17, -29

2y2Â + 64y + 510=0

2y2Â + 30y + 34y + 510=0

2y(y + 15) + 34(y + 15)=0

(2y + 34)(y + 15)=0

y =-17, -15

Hence, xâ‰¤y

2x2Â â€“ 42x + 216=0

2x2Â â€“ 24x â€“ 18x + 216=0

2x(x â€“ 12) â€“ 18(x â€“ 12)=0

(2x â€“ 18) (x â€“ 12)=0

x =9, 12

y2Â â€“ 26y + 168=0

y2Â â€“ 12y â€“ 14y + 168=0

y(y â€“ 12) â€“ 14( y â€“ 12)=0

(y â€“ 14)(y â€“ 12)=0

y =14, 12

Hence, xâ‰¤y

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