MBA CET 2026: Number Series
Q1. Find the odd man out.
4, 12, 42, 196, 1005, 6066, 42511
Correct Option: B
Rationale: The pattern is ×n + n².
4 × 2 + 2² = 12
12 × 3 + 3² = 45 (Not 42)
45 × 4 + 4² = 196
196 × 5 + 5² = 1005
So, 42 is the odd man out.
Q2. Find the missing number.
51, 66, __, 102, 123, 146
Correct Option: D
Rationale: The pattern is an increasing difference of +2 in each step.
51 + 15 = 66
66 + 17 = 83
83 + 19 = 102
102 + 21 = 123
123 + 23 = 146
Therefore, the missing number is 83.
Q3. Find the missing number.
89250, 17850, 7140, 1428, 571.2, ?
Correct Option: A
Rationale: The pattern is alternating division by 5 and 2.5.
89250 ÷ 5 = 17850
17850 ÷ 2.5 = 7140
7140 ÷ 5 = 1428
1428 ÷ 2.5 = 571.2
571.2 ÷ 2.5 = 228.48.
Q4. Find the missing number.
1.5, 4, 20, 129, ?, 10505
Correct Option: B
Rationale: The pattern follows ×n + n³.
The progression reaches 1048, which fits the final step toward 10505 in the specific sequence growth.
Q5. Find the missing number.
5, 13, 29, __, 122, 253
Correct Option: C
Rationale: The pattern is ×2 + 3.
5 × 2 + 3 = 13
13 × 2 + 3 = 29
29 × 2 + 3 = 61
Q6. Find the missing number.
3, 1731, ?, 3243, 3459, 3523
Correct Option: B
Rationale: The differences are cubes of even numbers in descending order.
1731 – 3 = 1728 (12³)
2731 – 1731 = 1000 (10³)
3243 – 2731 = 512 (8³)
3459 – 3243 = 216 (6³)
3523 – 3459 = 64 (4³)
