Practice Aptitude Questions For RBI Grade B & Upcoming Exams 2017

Practice Aptitude Questions For RBI Grade - B & Upcoming Exams 2017 (Number Series):

Dear Readers, Important Practice Aptitude Questions for  RBI Grade B 2017 Exam was given here with Solutions. Aspirants those who are preparing for RBI Grade - B and all other Competitive examination can use this.

Directions (Q. 1-10): In each of the following number series, a wrong number is given. Find out the wrong number.

1). 1,    8,    66,    460,    2758,    13785,    55146

a)   460

b)   2758

e)   55146

2). 56,    57,    48,    73,    24,    105,    -10

c)   105

d)   -10

3). 2,    2,    13,    59,    363,    2519,    20161

b)   20161

c)   2519

e)   363

4). 3,    1,    3,    0.7,    3,    0.6,    3,    0.5,    3

b)   0.7

c)   0.6

e)   0.5

5). 2,   6,   13,   26,   54,   100,   197

b)   100

d)   197

6). 3,   7.5,   15,   37.5,   75,   167.5,   375

a)   167.5

c)   37.5

e)   7.5

7). 0,   1,   9,   36,   99,   225,   441

d)   225

e)   441

8). 2,   3,   5,   8,   14,   23,   41,   69

9). 5,   10,   17,   27,   37,   50,   65

10). 108,   54,   36,   18,   9,   6,   4

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

Explanation With Answer Key:

1).1   8   66   460   2758   13785   55146

Here 1 × 9 - 1 = 8; 8 × 8 + 2 = 66; 66 × 7 - 3 = 459;

459 × 6 + 4 = 2758; 2758 × 5 - 5 = 13785; 13785

× 4 + 6 = 55146

Answer: a)

2).56   57   48   73   24   105   -10

Here 56 +1^2 = 57;

57 – 3^2 = 48; 48+ 5^2 = 73; 73- 7^2 = 24;

24 + 9^2 = 105; 105 -11^2 = -16

Answer: d)

3).2   2   13   59   363   2519   20161

Here 2 × 3 - 4 = 2; 2 × 4 + 5 = 13;

13 × 5 - 6 = 59; 59 × 6 + 7 = 361;

361 × 7 - 8 = 2519; 2519 × 8 + 9 = 20161

Answer: e)

4).3   1   3   0.7   3   0.6   3

3 × 1/3 = 1;

1 × 3 = 3;

3 × 1/4 = 0.75;

0.75 × 4 = 3;

3 × 1/5 = 0.6;

0.6 × 5 = 3;

3 × 1/6 = 0.5;

0.5 × 6 = 3.

Answer: b)

5).2   6   13   26   54   100   197

Here 2 × 2 + 2 = 6; 6 × 2 + 1 = 13;

13 × 2 + 0 = 26; 26 × 2 - 1 = 51;

51 × 2 - 2 = 100; 100 × 2 - 3 = 197

Answer: c)

6). The series is ×2.5, ×2 alternately

Answer: a)

7).The differences are

0  1 9  36  99  225  441

0²   1²   3²  6²   10²   15²  21²

Answer: c)

8).The series is an alternate series, having

S 1 = 2   5   14   41; ×3 – 1 in each term

S 2 = 3   8   23   69; ×3 – 1 in each term

Answer: e)

9).The series is +5, +7, +9, +11, ....

Answer: d)

10).The series is ÷2, ÷1.5 alternately.

Answer: d)

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