SBI Clerk Pre Quantitative Aptitude (Day-31)

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Wrong Number Series

Directions (1 – 5): Find the wrong term in the following number series

1) 534, 266, 132, 64, 31.5, 14.75

a) 534

b) 132

c) 64

d) 31.5

e) 14.75

2) 289, 292, 297, 306, 322, 356

a) 322

b) 297

c) 356

d) 306

e) 292

3) 1924, 1790, 1610, 1370, 1064, 684

a) 1610

b) 1064

c) 684

d) 1790

e) 1370

4) 172, 200, 263, 388, 604, 947, 1459

a) 263

b) 388

c) 200

d) 604

e) 947

5) 9, 16, 45, 175, 875, 5244

a) 175

b) 45

c) 875

d) 5244

e) 16

Missing Number Series

Direction (6 – 10): What value should come in the place of question mark in the given series?

6) 2209, 1849, 1681, 1369, 961, 841, ?

a) 529

b) 729

c) 625

d) 441

e) 576

7) 19, 23, 32, 48, 73, 109, ?

a) 162

b) 158

c) 170

d) 148

e) 126

8) 23, 34.5, 69, 172.5, 517.5, 1811.25, ?

a) 7250

b) 7234

c) 7245

d) 7256

e) 7124

9) 599, 722, 968, 1337, 1829, 2444, ?

a) 3182

b) 2896

c) 3459

d) 2997

e) 4256

10) 11, 43, 170, 677, 2704, 10811, ?

a) 43838

b) 45238

c) 43278

d) 43238

e) 41278

Answers :

Directions (1-5) :

1) Answer: C

The correct series is,

534, 266, 132, 65, 31.5, 14.75

The pattern is, ÷ 2 – 1

The wrong term is, 64

2) Answer: A

The correct series is,

289, 292, 297, 306, 323, 356

The pattern is, +(2¹ + 1), +(2² + 1), +(2³ + 1), +(2⁴ + 1), +(2⁵ + 1),…

The wrong term is, 322

3) Answer: D

The correct series is,

1924, 1792, 1610, 1370, 1064, 684

The pattern is, -(11² + 11), -(13² + 13), -(15² + 15), -(17²+17), -(19² + 19),..

The wrong term is, 1790

4) Answer: C

The correct series is,

172, 199, 263, 388, 604, 947, 1459

The pattern is, +3³, +4³, +5³, +6³, +7³, +8³,..

The wrong term is, 200

5) Answer: A

The correct series is,

9, 16, 45, 176, 875, 5244

The pattern is, *2 – 2, *3 – 3, *4 – 4, *5 – 5, *6 – 6,..

The wrong term is, 175

Directions (6-10) :

6) Answer: A

Square of prime numbers

2209=47*47

1849=43*43

1681=41*41

1369=37*37

961=31*31

841=29*29

529=23*23

7) Answer: B

19+2²=23

23+3²=32

32+4²=48

48+5²=73

73+6²=109

109+7²=158

8) Answer: C

23*1.5=34.5

34.5*2=69

69*2.5=172.5

172.5*3=517.5

517.5*3.5=1811.25

1811.25*4=7245

9) Answer: A

599 + (1*123) = 722

722 + (2*123) = 968

968 + (3*123) = 1337

1337 + (4*123) = 1829

1829 + (5*123) = 2444

2444 + (6*123) = 3182

10) Answer: D

11*4-1=43

43*4-2=170

170*4-3=677

677*4-4=2704

2704*4-5=10811

10811*4-6=43238

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