What comes next in the series: 10, 39, 14, 33, 18, 27, 22, ?
Solution
Two series alternate: 10, 14, 18, 22 (+4) and 39, 33, 27 (−6).
The next term continues the second: 27 − 6 = 21.
Answer: (A) 21
Logical Reasoning · Coding and series
Number Series: MAH CET, NMAT and SNAP practice questions
20 questions in the pattern of MAH MBA CET, NMAT and SNAP. Each question is marked with the exams it suits. Answer it, then open the step-by-step solution.
Exam:
What comes next in the series: 120, 210, 336, 504, 720, ?
Solution
The rule is n(n + 1)(n + 2) for n = 4, 5, 6, …: 4 → 120, 5 → 210, 6 → 336.
For n = 9: 990.
Answer: (D) 990
What comes next in the series: 25200, 25200, 12600, 4200, 1050, ?
Solution
Divide by 1, 2, 3, 4, … in turn.
1050 ÷ 5 = 210.
Answer: (B) 210
What comes next in the series: 15, 23, 36, 54, 77, 105, ?
Solution
Differences: 8, 13, 18, 23, 28, increasing by 5.
Next = 105 + 33 = 138.
Answer: (A) 138
What comes next in the series: 6, 13, 27, 55, 111, ?
Solution
Each term = previous × 2 + 1.
111 × 2 + 1 = 223.
Answer: (D) 223
What comes next in the series: 25, 62, 123, 214, 341, ?
Solution
The terms are cubes -2: 3³-2, 4³-2, 5³-2, 6³-2, 7³-2.
Next: 8³-2 = 510.
Answer: (D) 510
Find the wrong number in the series: 18, 21, 27, 34, 48, 63, 81
Solution
The differences should be 3, 6, 9, 12, 15, 18 (increasing by 3).
So the term should be 36, not 34.
Answer: (A) 34
What comes next in the series: 9, 27, 31, 93, 97, 291, ?
Solution
The operations alternate: × 3, + 4, × 3, + 4, …
Next: 291 × 3 = 295.
Answer: (C) 295
What comes next in the series: 8, 20, 44, 92, 188, ?
Solution
Each term = previous × 2 + 4.
188 × 2 + 4 = 380.
Answer: (B) 380
What comes next in the series: 1, 12, 13, 25, 38, 63, ?
Solution
Each term is the sum of the two before it.
38 + 63 = 101.
Answer: (A) 101
What comes next in the series: 6, 12, 20, 30, 42, ?
Solution
The rule is n² − n for n = 3, 4, 5, …: 3 → 6, 4 → 12, 5 → 20.
For n = 8: 56.
Answer: (A) 56
What comes next in the series: 37, 50, 65, 82, 101, ?
Solution
The terms are squares +1: 6²+1, 7²+1, 8²+1, 9²+1, 10²+1.
Next: 11²+1 = 122.
Answer: (D) 122
What comes next in the series: 5, 4, 7, 20, 79, ?
Solution
The multiplier grows: × 1, × 2, × 3, … (then − 1 each time).
Next = 79 × 5 − 1 = 394.
Answer: (D) 394
What comes next in the series: 4, 9, 25, 49, 121, 169, ?
Solution
Squares of consecutive primes.
The next one is 289.
Answer: (B) 289
What comes next in the series: 4, 20, 45, 81, 130, 194, ?
Solution
Differences are squares: 16, 25, 36, 49, 64.
Next = 194 + 81 = 275.
Answer: (C) 275
What comes next in the series: 20, 59, 24, 57, 28, 55, 32, ?
Solution
Two series alternate: 20, 24, 28, 32 (+4) and 59, 57, 55 (−2).
The next term continues the second: 55 − 2 = 53.
Answer: (D) 53
Find the missing term: 6, 12, ?, 48, 96, 192
Solution
Each term is 2 times the previous one.
? = 12 × 2 = 24.
Answer: (A) 24
What comes next in the series: 6, 18, 21, 63, 66, 198, ?
Solution
The operations alternate: × 3, + 3, × 3, + 3, …
Next: 198 × 3 = 201.
Answer: (C) 201
What comes next in the series: 4, 4, 8, 24, 96, ?
Solution
The multiplier grows: × 1, × 2, × 3, ….
Next = 96 × 5 = 480.
Answer: (C) 480
What comes next in the series: 28, 33, 42, 55, 72, 93, ?
Solution
Differences: 5, 9, 13, 17, 21, increasing by 4.
Next = 93 + 25 = 118.
Answer: (D) 118
These are original practice questions written by Target Campus in the pattern and difficulty of MAH MBA CET, NMAT, SNAP and other MBA entrance tests. They are not previous-year papers.
Preparing for MAH CET, SNAP or NMAT? Courses, live classes and mocks by Dr. Kiran Derle at Target Campus.
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