# Number Series Questions and Answers updated daily – Aptitude

Number Series Questions: Solved 1295 Number Series Questions and answers section with explanation for various online exam preparation, various interviews, Aptitude Category online test. Category Questions section with detailed description, explanation will help you to master the topic.

## Number Series Questions

121. What will come in place of the question mark (?) in the following number series?
16, 24, 60, 210, 945, ?

Correct Ans:5197.5
Explanation:
Pattern:
16*1.5 = 24
24*2.5 = 60
60*3.5 = 210
210*4.5 = 945
945*5.5 = 5197.5
Workspace

122. Find the missing number.
224, 113, 121, 269, 1140, ?

Correct Ans:9245
Explanation:
The pattern is,
224*0.5 + 13 = 113
113*1 + 23 = 121
121*2 + 33 = 269
269*4 +43 = 1140
1140*8 + 53 = 9245
Workspace

123. Find the missing number.
4, 6, 15, 49, 201, 1011, ?

Correct Ans:6073
Explanation:
The pattern is,
4*1 + 2 = 6
6*2 + 3 = 15
15*3 + 4 = 49
49*4 + 5 = 201
201*5 + 6 = 1011
1011*6 + 7 = 6073
Workspace

124. Find the Missing number in the the below series:

6, 29, 181, 1457, 14581, ?

Correct Ans:174985
Explanation:
Pattern is:
6 Ã— 4 + 5 = 29
29 Ã— 6 + 7 = 181
181 Ã— 8 + 9 = 1457
1457 Ã— 10 + 11 = 14581
14581 Ã— 12 + 13 = 174985

Hence, the missing term is 174985
Workspace

125. Find the Missing number in the the below series:

4, 17, 43, 95, ?, 407

Correct Ans:199
Explanation:
Pattern is:
4 + 13 = 17
17 + (13 * 2) = 17 + 26 = 43
43 + (26 * 2) = 43 + 52 = 95
95 + (52 * 2) = 95 + 104 = 199
199 + (104 * 2) = 199 + 208 = 407

Hence, the missing term is 199
Workspace

126. Find the missing number.
10, 15, 35, 82.5, ?, 562.5

Correct Ans:205
Explanation:
The pattern is:
10 * 0.5 + 10 = 15
15 * 1 + 20 = 35
35 * 1.5 + 30 = 82.5
82.5 * 2 + 40 = 205
205 * 2.5 + 50 = 562.5
Workspace

127. Find the missing number.
630, 157.5, 45, 15, 6, ?

Correct Ans:3
Explanation:
The pattern is:
630 Ã· 4 = 157.5
157.5 Ã· 3.5 = 45
45 Ã· 3 = 15
15 Ã· 2.5 = 6
6 Ã· 2 = 3
Workspace

128. In the following series one number is wrong.
Find out the wrong number
10, 14, 78, 114, 624, 726

Correct Ans:624
Explanation:
The series is,
10 + 22 = 14
14 + 43 = 78
78 + 62 = 114
114 + 83 = 626
626 + 102 = 726
Workspace

129. In the following series one number is wrong.
Find out the wrong number
1, 3, 10, 36, 152, 760, 4632

Correct Ans:760
Explanation:
The series is,
1*1 + 2 = 3
3*2 + 4 = 10
10*3 + 6 = 36
36*4 + 8 = 152
152*5 + 10 = 770
770*6 + 12 = 4632
Workspace

130. Find the missing number.
7, 13, ?, 35, 54

Correct Ans:22
Explanation:
The series is,
7*2 - 12 = 13
13*2 - 22 = 22
22*2 - 32 = 35
35*2 - 42 = 54
Workspace

131. Find the missing number.
12, 12, 18, 36, 90, 270, ?

Correct Ans:945
Explanation:
The series is,
12*1 = 12
12*1.5 = 18
18*2 = 36
36*2.5 = 90
90*3 = 270
270*3.5 = 945
Workspace

132. Find the missing number.
6, 26, 134, 666, 3334, 16666, ?

Correct Ans:83334
Explanation:
The series is,
6*5 - 4 = 26
26*5 + 4 = 134
134*5 - 4 = 666
666*5 + 4 = 3334
3334*5 - 4 = 16666
16666*5 + 4 = 83334
Workspace

133. In the following series one number is wrong.
Find out the wrong number
28, 14.5, 15.5, 24.75, 51.5, 133.25, 396.75

Correct Ans:133.25
Explanation:
The series is
28*0.5 + 0.5 = 14.5
14.5*1 + 1 = 15.5
15.5*1.5 + 1.5 = 24.75
24.75*2 + 2 = 51.5
51.5*2.5 + 2.5 = 131.25
131.25*3 + 3 = 396.75
Workspace

134. In the following series one number is wrong.
Find out the wrong number
9, 10, 19, 58, 231, 1166, 6935

Correct Ans:1166
Explanation:
The series is
9 Ã— 1 + 1 = 10
10 Ã— 2 â€“ 1 = 19
19 Ã— 3 + 1 = 58
58 Ã— 4 â€“ 1 = 231
231 Ã— 5 + 1 = 1156
1156 Ã— 6 â€“ 1 = 6935
Workspace

135. Find the missing number.
?, 212, 339, 508, 725, 996

Correct Ans:121
Explanation:
The series is
121 = 53 - 4
212 = 63 - 4
339 = 73 - 4
508 = 83 - 4
725 = 93 - 4
996 = 103 - 4
Workspace

136. Find the missing number.
3, 4, 12, ?, 196, 1005

Correct Ans:45
Explanation:
The series is
3*1 + 1 = 4
4*2 + 4 = 12
12*3 + 9 = 45
45*4 + 16 = 196
196*5 + 25 = 1005
Workspace

137. Find the missing number.
10395, 6930, 2772, 792, 176, ?

Correct Ans:32
Explanation:
The series is
10395 * 2/3 = 6930
6930 * 2/5 = 2772
2772 * 2/7 = 792
792 * 2/9 = 176
176 * 2/11 = 32
Workspace

138. In the following series one number is wrong.
Find out the wrong number
1, 4, 6, 17, 29, 66, 125

Correct Ans:125
Explanation:
The series is
4 - 1 = 3 = 21 + 1
6 - 4 = 2 = 22 - 2
17 - 6 = 11 = 23 + 3
29 - 17 = 12 = 24 - 4
66 - 29 = 37 = 25 + 5
(124) - 66 = 58 = 26 - 6
Workspace

139. In the following series one number is wrong.
Find out the wrong number
14, 15.5, 32.5, 99, 397.5, 1990, 11935.5

Correct Ans:1990
Explanation:
The series is
14 Ã— 1 + 1.5 = 15.5
15.5 Ã— 2 + 1.5 = 32.5
32.5 Ã— 3 + 1.5 = 99
99 Ã— 4 + 1.5 = 397.5
397.5 Ã— 5 + 1.5 = 1989
1989 Ã— 6 + 1.5 = 11935.5
Workspace

140. Find the missing number.
6, 7, 16, 51, 208, ?, 6276

Correct Ans:1045
Explanation:
The series is
6 * 1 + 1 = 7
7 * 2 + 2 = 16
16 * 3 + 3 = 51
51 * 4 + 4 = 208
208 * 5 + 5 = 1045
1045 * 6 + 6 = 6276
Workspace

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