Number Series - MCQ 1 - Banking Exams MCQ

32 * 8 = 256
256 * 4 = 1024
1024 * 2 = 2048
2048*1 = 2048

9 * 0.5 + 0.5 = 5
5 * 1 + 1 = 6
6 * 1.5 + 1.5 = 10.5
10.5 * 2 + 2 = 23
23 * 2.5 + 2.5 = 60

The correct answer is 89 because each number in the sequence, when divided by 9, leaves a remainder of 8. Here’s the breakdown:

• 17 divided by 9 leaves a remainder of 8.
• 98 divided by 9 leaves a remainder of 8.
• 26 divided by 9 leaves a remainder of 8.
• 35 divided by 9 leaves a remainder of 8.
• 80 divided by 9 leaves a remainder of 8.

So, the missing number should also leave a remainder of 8 when divided by 9. Among the given options, 89 is the only number that fits this pattern.

2 * 6 + 5 = 17
17 * 5 + 4 = 89
89 * 4 + 3 = 359
359 * 3 + 2 = 1079
1079 * 2 + 1 = 2159

7 × 0.5 + 1 = 4.5.
4.5 × 1 + 1 = 5.5.
5.5 × 2 + 1 = 12.
12 × 4 + 1 = 49.
49 × 8 + 1 = 393.

7 + 1³ – 1 = 7
7 + 2³ – 2 = 13
13 + 3³ – 3 = 37

1 * 2 + 18 = 20
20 * 2 + 18 = 58
58 * 2 + 18 = 134
134 * 2 + 18 = 286

Sub-series formed by the difference between consecutive terms is 2, 10, 30 and 68.

This sub-series follows the below pattern.

1³ + 1, 2³ + 2, 3³ + 3 and 4³ + 4.

So the next term of the difference sub-series will be 5³ + 5 = 130. Final answer will be 113 + (5³ + 5) = 113 + 130 = 243.

Hence, answer is 243. Below is a detailed representation of the entire series.

3 + (1³ + 1) = 3 + 2 = 5
5 + (2³ + 2) = 5 + 10 = 15
15 + (3³ + 3) = 15 + 30 = 45
45 + (4³ + 4) = 45 + 68 = 113
113 + (5³ + 5) = 113+130 = 243.

3.25 * 2 = 6.5
6.5 * 3 = 19.5
19.5 * 4 = 78

68 – 7 = 61; 61 – 7 = 54
124 + 7 = 131

4 * 1 + 1 = 5
5 * 1.5 – 1.5= 6
6 * 2 + 2 = 14
14 * 2.5 – 2.5 = 32.5
32.5 * 3 + 3 = 100.5

8 * 0.5 = 4
4 * 1 = 4
4 * 2 = 8
8 * 4 = 32
32 * 8 = 256

2 + 1² – 1 = 2
2 + 2² + 1= 7
7 + 4² – 1= 22

6 * 1 + 2 = 8
8 * 1.5 – 4 = 8
8 * 2 + 6 = 22
22 * 2.5 – 8 = 47
47 * 3 + 10 = 151

4 + 1² + 1= 6
6 + 3² – 1= 14
14 + 5² + 1= 40

6*1 – 1 + 1 = 6
6*2 – 2 – 3 = 7
7*3 – 1 + 5 = 25

2 + 1³ + 2 = 5
5 + 2³ + 4 = 17
17 + 3³ + 6 = 50
50 + 4³ + 8 = 122

2 * 4 + 1 = 9
9 * 4 + 3 = 39
39 * 4 + 5 = 161
161 * 4 + 7 = 651
651 * 4 + 9 = 2613

5*2 – 2 = 8
8*2 + 4 = 20
20*2 – 6 = 34

5 * 1 + 1 = 6
6 * 2 – 2 = 10
10 * 3 + 3 = 33
33 * 4 – 4 = 128
128 * 5 + 5 = 645