Practice Quantitative Aptitude Questions For Upcoming SBI PO Prelims & TMB Exams 2017 (Number Series & Simplification)

Practice Quantitative Aptitude Questions For Upcoming SBI PO Prelims & TMB Exams 2017 (Number Series & Simplification):

Dear Readers, Important Practice Aptitude Questions for  Upcoming Exams was given here with Solutions. Aspirants those who are preparing for the Bank Examination and other Competitive Examination can use this.

Directions (Q.1-5): In the following number series only one number is wrong. Find out the wrong number.

1). 11, 12, 26, 81, 320, 1645

a)    11

b)    12

c)    81

d)    320

e)    None of these

2). 9, 26, 65, 126, 217, 342

a)    9   

b)    126

c)    26 

d)    342

e)    None of these

3). 18, 10, 11, 17.5, 40, 91, 274

a)    18

b)    11

c)    10

d)    40

e)    None of these

4). 12, 30, 99, 408, 2050, 12348

a)    12

b)    30

c)    2050

d)    408

e)    None of these

5). 50, 51, 47, 56, 45, 65, 29

a)    45

b)    50

c)    29

d)    65

e)    None of these

Directions (Q. 6-10): What should come in place of the question mark (?) in the following questions?

6). 1.65% of 310 + 1.75% of 430 = ?

a)    10.27

b)    12.64

c)    14.44

d)    16.56

e)    None of these

7). 30% of (2/7) of (2/9) of (2/5) of 9450 = ?

a)    32

b)    36

c)    42

d)    48

e)    52

8).361/? = ?/289

a)    357

b)    399

c)    323

d)    327

e)    None of these

9). If 15625 = (x²)³, then x = ?

a)    3

b)    4

c)    5

d)    7

e)    9

10). (1/1024) ^-2/5 + (1/343) ^-2/3 = ? × 5

a)    65

b)    42

c)    13

d)    21

e)    27

Answer Key:

1).d   2).d   3).d   4).c    5).a    6).b    7).d    8).c    9).c    10).c

1).The series is

11*1 + 1 = 12

12*2 + 2 = 26

26*3 + 3 = 81

81*4 + 4 = 328

328*5 + 5 = 1645

so 320 is wrong

Answer: d)

2).Here the number follows the given rule

2³ + 1, 3³ – 1 , 4³ + 1, 5³ – 1, 6³ + 1, 7³ - 1

so 126 is wrong number.

Answer: d)

3).Wrong Number: 40

Correct Number: 37

18 * 0.5 + 1 = 10

10 * 1 + 1 = 11

11 * 1.5 + 1 = 17.5

17.5 * 2 + 1 = 36

36 * 2.5 + 1 = 91

91 * 3 + 1 = 274

Answer: d)

4).(9×1) + 3 = 12

(12×2) + 6 = 30

(30×3) + 9 = 99

(99×4) + 12 = 408

(408×5) + 15 = 2055

(2055×6) + 18 = 12348

Answer: c)

5).50 + 1² (1) = 51

51 – 2² (4) = 47

47 + 3² (9) = 56

56 – 4² (16) = 40

40 + 5² (25) = 65

65 – 6² (36) = 29

Answer: a)

6).? = 1.65% of 310 + 1.75% of 430

= [(1.65 × 310) /100] + [(1.75 × 430)/100]

= 5.115 + 7.525 = 12.64

Answer: b)

7).? = 30% of 2/7 of 2/9 of 2/5 of 2/3 of 9450

= 30% of [(16/945) × 9450]

= 30% of 160 = 48

Answer: d)

8).361/? = ?/289

(?)² = 361 × 289

 (?)² = (19)² × (17)²

? = 19 × 17 = 323

Answer: c)

9).15625 = (x²)³

 (x²)³ = 15625 = (5)⁶

Answer: c)

10).(1/1024) ^-2/5 + (1/343) ^-2/3 = ?×5

(1/4⁵) ^-2/5 + (1/7³) ^-2/3 = ? × 5

4² + 7² = ? × 5

16 + 49 = ? × 5

65 = ? × 5

? = 65/5 = 13

Answer: c)

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