Number Series Questions and Answers

Definition of Number Series

  • Go through the entire page to solve Number Series Questions and Answers easily.
  • A Number series is the total of all the numbers of numbers produced out of some pattern or trend.
  • All term in the sequence meet a specific logical rule which needs to be recognized in order to find the missing terms.
Number Series Questions and Answers

For example,
‘2+4+6+8+10’ is a number series – the sum of the first five even numbers or the multiples of 2.

Most of the competitive exams or management aptitude tests frequently asked questions based on number series. In Number Series the examine would be given a particular sequence in which he’s to analyze the pattern followed by the said series and accordingly he would be asked to foretell the following number of the series following the same trend or pattern.

Types of Number Series Problems –

  • Add up Series (+) :  Just adding a constant number everytime. For example:  (13, 18, 23, 28 ….).
  • Add up Series (- ):  , Just subtracting a constant number every time. For example : (28, 23, 18, 13 ……).
  • Step up Series (+/-) :  Adding/Subtracting a variable number, in this case we are adding 2n for n = 0, 1, 2, 3 …… For example : 0, 2, 6, 12, 20…. or 20, 12, 6, 2, 0, 0 …..
  • Square up (+/-) –  Given series is in the square of n where  n= 1,2,3,4,5,6… i.e. 1,4,9,16,25,36…
  • Square add up Series(+/-) : Adding n2 every time and incrementing value of n starting from 1 i.e. 1,5, 14, 30, 55, ……  and Subtracting n2 every time and decrementing value of n i.e. 34, 33, 29, 20,
  • Cube Up Series : Given series is in the cube of n where n = 1,2,3,4,5,6… i.e. 1,8,27,64,125,216….
  • Cube add up Series : Adding n3 every time with incrementing of n by 1 i.e. 1,9,36…
  • Prime up(+/-) : Sequence consist of Prime numbers i.e. 2,3,5,7,11…
  • Prime Square up(+/-) : Sequence consist of squares of prime numbers i.e. 4,9,25,49,121..
  • Arithmetic Series: Sequence consist of Arithmetic Progression i.e. 3,6,9,…
  • Geometric Series : Sequence consist of Geometric Progression i.e. 2,6,18,54,…

Sample Number Series Questions

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Question 1

Time: 00:00:00
Directions to Solve

Choose the correct alternative that will continue the same pattern and find out the wrong/odd number from the given series.

Find out the wrong number.

132 131 132 129 132 127 132

125 132

125 132

131 132

131 132

129 132

129 132

125 130

125 130

129 130

129 130

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Question 2

Time: 00:00:00
Directions to Solve

Choose the correct alternative that will continue the same pattern and find out the wrong/odd number from the given series.

110 120 125 135 140 150 155

170 165

170 165

160 170

160 170

160 175

160 175

160 165

160 165

165 170

165 170

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Question 3

Time: 00:00:00
Explanation: This is an alternating repetition series. The number 132 alternates with a series in which each number decreases by 2.

240 240 231 231 222 222 213

213 204

213 204

213 205

213 205

204 213

204 213

209 214

209 214

214 204

214 204

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Question 4

Time: 00:00:00
Directions to Solve

Choose the correct alternative that will continue the same pattern and find out the wrong/odd number from the given series.

117 117 134 120 120 131 123

126 123

126 123

134 120

134 120

123 133

123 133

123 128

123 128

133 128

133 128

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Question 5

Time: 00:00:00
Directions to Solve

Choose the correct alternative that will continue the same pattern and find out the wrong/odd number from the given series.

5, 6, 4, 8, 9, 4, 11

12, 13

12, 13

4, 12

4, 12

12, 4

12, 4

13, 12

13, 12

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Question 6

Time: 00:00:00
Directions to Solve

Choose the correct alternative that will continue the same pattern and find out the wrong/odd number from the given series.

161 157 150 161 143 136 161

129 161

129 161

127 120

127 120

131 161

131 161

122 115

122 115

129 122

129 122

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Question 7

Time: 00:00:00
Directions to Solve

Choose the correct alternative that will continue the same pattern and find out the wrong/odd number from the given series.

109 116 123 130 137 144 151

159 166

159 166

156 162

156 162

158 166

158 166

158 165

158 165

154 161

154 161

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Question 8

Time: 00:00:00
Directions to Solve

Choose the correct alternative that will continue the same pattern and find out the wrong/odd number from the given series.

18 22 22 26 30 22 34

38 32

38 32

38 22

38 22

22 38

22 38

32 36

32 36

22 36

22 36

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Question 9

Time: 00:00:00
Directions to Solve

Choose the correct alternative that will continue the same pattern and find out the wrong/odd number from the given series.

18 21 21 25 28 21 32

35 18

35 18

35 21

35 21

35 29

35 29

34 21

34 21

22 36

22 36

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Question 10

Time: 00:00:00
Directions to Solve

Choose the correct alternative that will continue the same pattern and find out the wrong/odd number from the given series.

1225, 1224, __, 1222, 1221

1220

1220

1223

1223

1219

1219

1226

1226

1218

1218

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Question 11

Time: 00:00:00
Directions to Solve

Choose the correct alternative that will continue the same pattern and find out the wrong/odd number from the given series.

__ 37, 31, 29, 23, 19, 17

47

47

43

43

40

40

42

42

41

41

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Question 12

Time: 00:00:00
Directions to Solve

Choose the correct alternative that will continue the same pattern and find out the wrong/odd number from the given series.

81, 100, 121, __, 169, 196, 225

156

156

130

130

144

144

125

125

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Question 13

Time: 00:00:00
Directions to Solve

Choose the correct alternative that will continue the same pattern and find out the wrong/odd number from the given series.

89, 83, 79, 73, 71, 67,  __