25, 36, 49, 81, 121, 169, 225
Correct answer A. 36
Topic / 43 questions
Odd Man Out and Series MCQs
Odd Man Out and Series MCQs give you a list of numbers and ask you to find the term that breaks the pattern or the next number in the sequence. They are common in NTS, ISSB, SSC and banking aptitude papers. Each question shows the correct answer instantly, helping you learn the patterns examiners reuse most often.
- Numbers 104
- Percentage 103
- Ratio and Proportion 80
- Age Questions 80
- Time and Work 73
- Fraction and Decimal 72
- Equations and Inequalities 64
- Average 59
- Basic Algebra 58
- Probability 45
- Odd Man Out and Series 43
- Boats and Streams 34
- Counting 32
- Problems on Trains 30
- Logarithm 30
- Problems on H.C.F and L.C.M 30
- Calendar 30
- Road Problems 26
- Word Problems 25
- Men and Food 24
- Compound Interest 21
- Time and Distance 19
- Clock 19
- Area 19
- Volume and Surface Area 19
- Simple Interest 19
- Problems on Numbers 17
- Pipes and Cistern 17
- True Discount 16
- Problems on Ages 15
- Alligation or Mixture 15
- Simplification 15
- Permutation and Combination 14
- Stocks and Shares 14
- Train Problems 14
- Races and Games 13
- Mixture Problems 13
- Banker's Discount 12
- Profit and Loss 12
- Square Root and Cube Root 11
- Surds and Indices 8
- Height and Distance 7
- Partnership 6
56, 72, 90, 110, 132, 150
Correct answer D. 150
36, 54, 18, 27, 9, 18.5, 4.5
Correct answer B. 18.5
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6, 13, 18, 25, 30, 37, 40
Correct answer D. 40
46080, 3840, 384, 48, 24, 2, 1
Correct answer C. 24
125, 127, 130, 135, 142, 153, 165
Correct answer D. 165
5, 16, 6, 16, 7, 16, 9
Correct answer A. 9
105, 85, 60, 30, 0, -45, -90
Correct answer A. 0
4, 6, 8, 9, 10, 11, 12
Correct answer B. 11
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52, 51, 48, 43, 34, 27, 16
Correct answer B. 34
1, 2, 6, 15, 31, 56, 91
Correct answer B. 91
1, 8, 27, 64, 124, 216, 343
Correct answer D. 124
8, 13, 21, 32, 47, 63, 83
Correct answer A. 47
22, 33, 66, 99, 121, 279, 594
Correct answer C. 279
Find out the wrong number in the given sequence of numbers.582, 605, 588, 611, 634, 617, 600
Correct answer A. 634
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3, 5, 7, 12, 17, 19
Correct answer D. 12
41, 43, 47, 53, 61, 71, 73, 81
Correct answer D. 81
835, 734, 642, 751, 853, 981, 532
Correct answer A. 751
331, 482, 551, 263, 383, 362, 284
Correct answer B. 383
16, 25, 36, 72, 144, 196, 225
Correct answer B. 72
About Odd Man Out and Series MCQs
Number series questions reward pattern recognition more than heavy calculation. This set includes sequences built on cubes such as 1, 8, 27, 64, squares like 16, 25, 36, alternating signs that double each time, and series where the differences between terms themselves form a pattern of primes or consecutive numbers. Odd man out items hide one wrong term, for example 100 placed among perfect cubes. A reliable method is to check differences first, then ratios, then squares and cubes, and finally alternating or two-step patterns. Practising this checklist builds speed for timed recruitment tests.
Exams that include Odd Man Out and Series MCQs
Pakistan
- NTS
- ISSB
- Army/Navy/PAF initial tests
- PPSC
- Banking job tests
India
- SSC CGL
- SSC CHSL
- IBPS Clerk
- RRB NTPC
Bangladesh
- Bank job exams
- Government job tests
Frequently asked questions
How do I find the odd man out in a number series?
Write down the difference between each pair of neighbouring terms and see whether they follow a pattern. If not, test ratios, then check whether the terms are squares, cubes or primes. The term that does not fit the rule all the others follow is the odd man out.
What is the next number in 4, -8, 16, -32, 64?
Each term is multiplied by minus 2 to give the next one. So the term after 64 is 64 multiplied by minus 2, which is minus 128. Spotting a constant multiplier with alternating signs is a common shortcut in series questions.
How many Odd Man Out and Series MCQs are on MCQs360?
MCQs360 offers 43 Odd Man Out and Series MCQs, each with an instant answer and free to practise without registration. Try to solve each in under a minute, and review any question where you guessed so you learn the underlying pattern.
Last reviewed October 2026