Number Series: Bank Exam Practice Questions (SBI, IBPS, RRB, PO & Clerk)

Ans: C

Explanation: The pattern is as follows: (previous number * 3) + (a number counting up from -3).
* 3*3 – 3 = 6
* 6*3 – 3 = 15
* 15*3 – 3 = 42
* 42*3 – 3 = 123
* 123*3 – 3 = 366

Ans: C

Explanation: The pattern in the series is as follows:
* 12 = (5 * 2) + 2
* 26 = (12 * 2) + 2
* 54 = (26 * 2) + 2
* 110 = (54 * 2) + 2
Therefore, the next number in the series will be:
* ? = (110 * 2) + 2 = 222

Ans: D

Explanation: The differences between consecutive numbers in the sequence are: 19, 22, 25, 28. The differences between these differences are constant at 3. Following this pattern, the next difference should be 28 + 3 = 31. Therefore, the missing number is 119 + 31 = 150.
Correct Option: D

Ans: B

Explanation: The pattern is as follows:
4 * 1 + 1 = 5
5 * 2 + 2 = 12
12 * 3 + 3 = 39
39 * 4 + 4 = 160
160 * 5 + 5 = 805
Correct Option: B

Ans: C

Explanation: The pattern is as follows:
* 40 / 2 = 20
* 20 * 1 = 20
* 20 * 1.5 = 30
* 30 * 2 = 60
* 60 * 2.5 = 150

Correct Option: C

Ans: D

Explanation: The pattern is as follows:
* 6 -> 6 * 1 – 1 = 5
* 5 -> 5 * 2 – 1 = 9
* 9 -> 9 * 3 – 1 = 26
* 26 -> 26 * 4 – 1 = 103
* 103 -> 103 * 5 – 1 = 514
Correct Option: D

Ans: C

Explanation: The sequence follows a pattern where the first letter increases alphabetically by one, and the second letter increases alphabetically by one, starting from the first term.
LP (L+1=M, P+1=Q), MR (M+1=N, R+1=S). So the pattern should be
LP, MR, NT (N+1=O, T+1=U), OV (O+1=P, V+1=W), PX
Therefore, the missing term is NT.
Correct Option: C

Ans: B

Explanation: The pattern is as follows:
7 + 3 = 10
10 + 9 = 19 (3*3)
19 + 15 = 34 (3*5)
34 + 23 = 57 (3*7+2)
57 + 41 = 98 (3*11+8)
The correct pattern should be:
7 + 3 = 10
10 + 9 = 19
19 + 15 = 34
34 + 25 = 59 (not 57, the difference is increasing by adding multiples of 2, 6, 10, 14, 18…)

Alternatively:
10-7=3
19-10=9
34-19=15
57-34=23 (Incorrect, should be 25)
98-57=41 (Incorrect)
The differences should be following the pattern:
3, 9, 15, 21, 27
Thus, 57 is incorrect and should be 59.

Ans: D

Explanation: The pattern in the series is as follows: 7 * 2 = 14, 14 * 3 = 42, 42 * 4 = 168, 168 * 5 = 840, 840 * 6 = 5040, 5040 * 7 = 35280. The wrong number is 30200, which should be 35280.

Ans: E

Explanation: The pattern in the series is: each number is obtained by multiplying the previous number by 2 and then adding 1.

3 * 2 + 1 = 7
7 * 2 + 1 = 15
15 * 2 + 1 = 31
31 * 2 + 1 = 63
63 * 2 + 1 = 127
127 * 2 + 1 = 255

Ans: D

Explanation: The pattern in the series is as follows:
11 * 2 + 1 = 23
23 * 2 + 1 = 47
47 * 2 + 1 = 95
95 * 2 + 1 = 191
191 * 2 + 1 = 383

Ans: B

Explanation: The series follows the pattern: multiply the previous number by 3, then subtract 0. 7*3-0 =21 , multiply by 3, then subtract 0. 21*3=63, subtract 0 and you will get the missing numbers.

7 * 1 + 2 = 9
9 * 2 + 3 = 21
21 * 3 + 0 = 63
63 * 3 + 0 = 189

Ans: A

Explanation: The pattern in the number series is as follows:
11 + 3 = 14
14 + 6 = 20
20 + 9 = 29
29 + 12 = 41
41 + 17 = 58
The difference between consecutive numbers increases by 3 each time.