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CBSE Class 10  >  Class 10 Test  >  Olympiad Preparation  >  Olympiad Test: Series Completion - Class 10 MCQ

Olympiad Test: Series Completion - Free MCQ with solutions Class 10


MCQ Practice Test & Solutions: Olympiad Test: Series Completion (15 Questions)

You can prepare effectively for Class 10 Olympiad Preparation for Class 10 with this dedicated MCQ Practice Test (available with solutions) on the important topic of "Olympiad Test: Series Completion". These 15 questions have been designed by the experts with the latest curriculum of Class 10 2026, to help you master the concept.

Test Highlights:

  • - Format: Multiple Choice Questions (MCQ)
  • - Duration: 20 minutes
  • - Number of Questions: 15

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Olympiad Test: Series Completion - Question 1
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There is a series of numbers which follow some definite order. Find the missing term and complete the series.

3, 4, 5, 5, 12, 13, 7, 24, 25, 9, ?, 41

Detailed Solution: Question 1

The given numbers are in the set of three numbers which are Pythagorean triplet. 
32 + 42 = 52, 52 + 122 = 132,
72 + 242 = 252,  92 + 402 = 412.

Olympiad Test: Series Completion - Question 2
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There is a series of numbers which follow some definite order. Find the missing term and complete the series.

10, 17, 26, 37, 50, …. ? 

Detailed Solution: Question 2

The pattern of the given series is
32 + 1 = 10;  42 + 1 = 17;  52 + 1 = 26;
62 + 1 = 37;  72 + 1 = 50;
∴ 82 + 1 = 65.

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Olympiad Test: Series Completion - Question 3
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There is a series of numbers which follow some definite order. Find the missing term and complete the series.

2, 4, 4, 8, 16, 16, 256, ?

Detailed Solution: Question 3


∴ ? = 32

Olympiad Test: Series Completion - Question 4
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There is a series of numbers which follow some definite order. Find the missing term and complete the series.

1, 5, 7, 14, 18, 20, 40, 44, 46, ? 

Detailed Solution: Question 4

1 + 4 = 5; 5 + 2 = 7; 7 × 2 = 14
14 + 4  = 18; 18 + 2 = 20; 20 × 2 = 40
40 + 4  = 44; 44 + 2 = 46; 46 × 2 = 92 
∴ ? = 92

Olympiad Test: Series Completion - Question 5
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There is a series of numbers which follow some definite order. Find the missing term and complete the series.

5, 12, 7, 15, 8, 18, 10, ? 

Detailed Solution: Question 5

Second, fourth, sixth terms are multiplies of 3 as, 12, 15, 18 and so on the eight-term will be 21.

Olympiad Test: Series Completion - Question 6
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There is a series of numbers which follow some definite order. Find the missing term and complete the series.

325, 259, 204, 160, 127, 105, ? 

Detailed Solution: Question 6

325 – 66 = 259; 259 – 55 = 204; 
204 – 44 = 160; 160 – 33 = 127;
127 – 22 = 105; 105 – 11 = 94;
∴ ? = 94

Olympiad Test: Series Completion - Question 7
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There is a series of numbers which follow some definite order. Find the missing term and complete the series.

0, 2, 3, 5, 8, 10, 15, 17, 24, 26, ?

Detailed Solution: Question 7


∴ ? = 35

Olympiad Test: Series Completion - Question 8
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There is a series of numbers which follow some definite order. Find the missing term and complete the series.

120, 99, 80, 63, 48, ? 

Detailed Solution: Question 8

Here
120 – 21 = 99;  99 – 19 = 80; 80 – 17 = 63; 
63 – 15 = 48; 48 – 13 = 35;
∴ ? = 35

Olympiad Test: Series Completion - Question 9
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There is a series of numbers which follow some definite order. Find the missing term and complete the series.

1, 1, 4, 8, 9, 27, 16, ?

Detailed Solution: Question 9


∴ ? = 64

Olympiad Test: Series Completion - Question 10
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There is a series of numbers which follow some definite order. Find the missing term and complete the series.

10, 14, 26, 42, 70, ? 

Detailed Solution: Question 10

10 + 14 + 2 = 26; 14 + 26 + 2 = 42; 
26 + 42 + 2 = 70; 42 + 70 + 2 = 114;
∴ ? = 114

Olympiad Test: Series Completion - Question 11
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In each of the following questions, one term in the number series is wrong. Find out the wrong term.

196, 169, 144, 121, 101.

Detailed Solution: Question 11

196 = 142; 169 = 132; 144 = 122;
121 = 112; 102 = 100; 
∴ 101 is wrong term.

Olympiad Test: Series Completion - Question 12
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In each of the following questions, one term in the number series is wrong. Find out the wrong term.

2, 6, 24, 96, 285, 568, 567 

Detailed Solution: Question 12

2 × 6 – 6 = 6; 6 × 5 – 5 = 25;
25 × 4 – 4 = 96; 96 × 3 – 3 = 285;
285 × 2 – 2 = 568; 568 × 1 – 1 = 567;
∴ 24 is odd.

Olympiad Test: Series Completion - Question 13
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In each of the following questions, one term in the number series is wrong. Find out the wrong term.

93, 309, 434, 498, 521, 533

Detailed Solution: Question 13

93 + 63 = 309;  309 + 53 = 434;
434 + 43 = 498;  498 + 32 = 525;
525 + 23 = 533;
∴ 521 is wrong term.

Olympiad Test: Series Completion - Question 14
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In each of the following questions, one term in the number series is wrong. Find out the wrong term.

3, 2, 8, 9, 13, 22, 18, 32, 23, 42

Detailed Solution: Question 14


2 + 10 = 12
∴ 9 is the wrong term. 

Olympiad Test: Series Completion - Question 15
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In each of the following questions, one term in the number series is wrong. Find out the wrong term.

8, 13, 21, 32, 47, 63, 83

Detailed Solution: Question 15

8 + 5 = 13; 13 + 8 = 21;
21 + 11 = 32; 32 + 14 = 46;
46 + 17 = 63; 63 + 20 = 83;
∴ 47 is odd.

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About this Class 10 Practice Test

This test contains 15 MCQs on Olympiad Test: Series Completion with detailed solutions for each question. It is part of the Olympiad Preparation for Class 10 course on EduRev, designed to align with the current Class 10 syllabus. Each solution explains not just the correct answer but also gives you an understanding of the topic — not just to attempt the question but also help you prepare for the exam with practice.

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If you found this Olympiad Test: Series Completion MCQ Test helpful, you can further enhance your Class 10 preparation with in-depth courses on EduRev, for all the subjects and topics available in Olympiad Preparation for Class 10 course. The course offers:
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