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Free Letter, Symbol and Number Series MCQs with Answers

299 Letter, Symbol and Number Series MCQs from Analytical and Logical Reasoning, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.

Series questions use numbers, letters, symbols or combinations arranged according to a hidden pattern. You may need to identify repeated operations, alternating rules, alphabetical positions, differences, reversals and mixed sequences to find a missing term or predict the next one.

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299 questions · page 5 of 15

81. Look at this series: 7, 10, 8, 11, 9, 12, ... What number should come next?

  • A. 7
  • B. 10
  • C. 12
  • D. 13

Explanation: This is a simple alternating addition and subtraction series. In the first pattern, 3 is added; In the second pattern, 2 is subtracted.

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Correct answer: 10

82. Many people were worried when they found that their photocopiers had been sometimes changing numbers; one photocopier sometimes, although not always, changed 6 into 8.A list of prices was copied on this photocopier. The first five prices on the copy·are shown below.$54.80$60.00$65.40$70.80$78.20In the original list, the prices had increased by the same amount each time. What was the next price.on the original list?

  • A. $81.60
  • B. $81.80
  • C. $83.60
  • D. $85.60

Explanation: Since the photocopiers change the 6s to 8s, we can assume that the first price is $54.60 instead of $54.80, the third price is actually…

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Correct answer: $81.60

83. Find the next number in the following sequence: 234, 2345, 23456, 234567, 234567_

  • A. 6
  • B. 2
  • C. 5
  • D. 8

Explanation: The sequence proceeds as follows: 234, 2345, 23456, 234567 Hence, the next number in this sequence should be 2345678.

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Correct answer: 8

84. P3C, R5F, T8I, V12L, _?

  • A. X16M
  • B. U20Z
  • C. X17O
  • D. N22I

Explanation: P,R,T,V shows that Q,S,U were skipped and so the next term should start with X after skipping W.

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Correct answer: X17O

85. ZA5, Y4B, XC6, W3D, _

  • A. E7V
  • B. V2E
  • C. VE5
  • D. VE7

Explanation: For the first letter, the letters are in reverse alphabetical order. Hence the fifth term would start with 'V'.

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Correct answer: VE7

86. Find the missing series 1, 5, 13, 25, ?

  • A. 41
  • B. 44
  • C. 23
  • D. 21
  • E. None of these

Explanation: The pattern is, 1 + 4 = 5 5 + 8 = 13 13 + 12 = 25 25 + 16 = 41 41 is the missing series.

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Correct answer: 41

87. If + means *, / means -, * means / and - means +, what will be the value of 4 + 11 / 5 - 55 = ?

  • A. -48.5
  • B. -11
  • C. 79
  • D. 94
  • E. None of these

Explanation: Using the correct symbols, we have: Given expression = 4 * 11 - 5 + 55 = 44 - 5 + 55 = 94

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Correct answer: 94

88. The following equation becomes mathematically correct when you interchange either the sign or the numbers as indicated in the question. Find the correct alternative. Given equation: (16 - 4) x 6 ÷ 2 + 8 = 30

  • A. 4 and 2
  • B. ÷ and -
  • C. 16 and 6
  • D. - and +
  • E. None of these

Explanation: As per option A), if we interchange 4 and 2 in the above equation, we get (16 - 2) x 6 ÷ 4 + 8 = 30 ---> 14 x (6/4) + 8 = 30 ---> 21 + 8 =…

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Correct answer: ÷ and -

89. In the following question, various terms of an alphabet sequence are given with one or more terms missing as shown by (?). Choose the missing term.N, N, P, L, S, I, W,?

  • A. B
  • B. C
  • C. D
  • D. E

Explanation: The explanation of this question will be added soon.

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Correct answer: E

90. Which number should come in the place of "?".

  • A. 7
  • B. 8
  • C. 9
  • D. 6
  • E. None of the above

Explanation: From left, 4 - 2 = 2 8 - 2 = 6 9 - 2 = 7

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Correct answer: 7

91. Find the number of triangles in the given figure:

  • A. 5
  • B. 6
  • C. 8
  • D. 10
  • E. None of these

Explanation: Five are the outer vertices of the star tips, the other five vertices are the vertices of the inner pentagon.

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Correct answer: 10

92. Directions: In the following question, a number sequence is given with one term missing. Choose the correct term that will continue the same pattern and replace the question mark in the given sequence. Q.1: 7,12,19, 28,?

  • A. 39
  • B. 38
  • C. 40
  • D. 41

Explanation: When 5 is added to 7 we get 12. After 5 next odd number is 7, so by adding 7 to 12 we get 19. After 7 we have next odd number 9.

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Correct answer: 39

93. Find the missing series 5, 7.5, 12.5, 22.5, ?

  • A. 42.5
  • B. 42
  • C. 44
  • D. 43.5
  • E. None of these

Explanation: The pattern is, 5 * 2 - 2.5 = 7.5 7.5 * 2 - 2.5 = 12.5 12.5 * 2 - 2.5 = 22.5 22.5 * 2 - 2.5 = 42.5 42.5 is the missing number.

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Correct answer: 42.5

94. Find the missing series 4, 6, 10, 14, 22, 26, 34, 38, 46, ?

  • A. 62
  • B. 58
  • C. 26
  • D. 42
  • E. None of these

Explanation: The pattern is, 2*2 = 4 2*3 = 6 2*5 = 10 2*7 = 14 2*11 = 22 2*13 = 26 2*17 = 34 2*19 = 38 2*23 = 46 2*29 = 58 58 is the missing series.

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Correct answer: 58

95. If A is coded as -, B is coded as +, C is coded as * and D is coded as / then evaluate 8 A 1 B 11 C 12 D 4 C 5?

  • A. 173
  • B. 174
  • C. 182
  • D. 172
  • E. 162

Explanation: Let's first substitute the given codes for the letters: A = - B = + C = * D = / Now, let's evaluate the expression step by step using the…

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Correct answer: 172

96. Find the missing series 1, 7, 3, 9, 6, 12, 10, 16, 15, ?

  • A. 18
  • B. 15
  • C. 20
  • D. 21
  • E. None of these

Explanation: The pattern is, First series is, 1 + 2 = 3 3 + 3 = 6 6 + 4 = 10 10 + 5 = 15 Second series is, 7 + 2 = 9 9 + 3 = 12 12 + 4 = 16 16 + 5 = 21…

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Correct answer: 21

97. Find the missing series 3, 7, 16, 35, ?, 153

  • A. 84
  • B. 74
  • C. 78
  • D. 63
  • E. None of these

Explanation: The pattern is, 3*2 + 1 = 7 7*2 + 2 = 16 16*2 + 3 = 35 35*2 + 4 = 74 74*2 + 5 = 153 74 is the missing number.

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Correct answer: 74

98. In the following question, by using which mathematical operator will the expression become correct? 18 ?6 ? 9 ? 27

  • A. x, ÷ and =
  • B. ÷ , x and =
  • C. x, + and =
  • D. +, - and =
  • E. None of these

Explanation: Given: 18 ?6 ? 9 ? 27 By placing ÷ , x and = , we get 18 ÷ 6 x 9 = 27 3 x 9 = 27 27 = 27.

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Correct answer: ÷ , x and =

99. Find the missing series 2, 6, 12, 20, 30, 42, 56, ?

  • A. 61
  • B. 64
  • C. 72
  • D. 70
  • E. None of these

Explanation: The pattern is, 1*2 = 2 2*3 = 6 3*4 = 12 4*5 = 20 5*6 = 30 6*7 = 42 7*8 = 56 8*9 = 72 72 is the missing number.

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Correct answer: 72

100. Find the missing series 6, 3, 3, 4.5, ?

  • A. 5.5
  • B. 7
  • C. 9
  • D. 11.5
  • E. 12

Explanation: The pattern is, 6 * 0.5 = 3 3 * 1 = 3 3 * 1.5 = 4.5 4.5 * 2 = 9 9 is the missing number.

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Correct answer: 9
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