Series

Question 1

What will be the next number? 3, 5, 7, 11, 13, 17…….

• A. 21
• B. 19
• C. 25
• D. 20

Answer: (B)

Arithmetic Aptitude Series
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This is a sequence of prime numbers

Question 2

Find wrong number in series:
12, 25, 49, 99, 187, 395, 789

• A. 789
• B. 187
• C. 99
• D. 49

Answer: (B)

Series
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12*2+1 =25
25*2-1 = 49
49*2+1 = 99
395*2-1 = 789

Question 3

Find wrong number in series:
34, 7, 37, 14, 36, 28, 43, 56

• A. 14
• B. 36
• C. 28
• D. 56

Answer: (B)

Series
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mixture of series (alternate numbers)
34+3=37,
37+3 =40...
7*2= 14
14*2= 28
28*2 =56

Question 4

Find wrong number in series:
1, 4, 9, 16, 25, 32, 49, 64

• A. 9
• B. 25
• C. 32
• D. 64

Answer: (C)

Series
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Square of natural numbers:
1²=1, 2² =4, 3²=9..............8²=64

Question 5

Find wrong number in series:
2, 7, 10, 22, 18, 37, 26, 46

• A. 10
• B. 18
• C. 26
• D. 46

Answer: (D)

Series
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two alternate series:
2+8 =10
7+15=22
10+8 =18
22+15=37
37+15 = 52
so, +8, +15, +8, +15, ......

Question 6

Find wrong number in series:
4, 12, 48, 240, 1240, 10080

• A. 12
• B. 240
• C. 1240
• D. 10080

Answer: (C)

Series
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4*3=12
12*4=48
48*5 = 240
240*6 = 1440

Question 7

Find wrong number in series:
2, 3, 6, 0, 8, -3, 14, -6

• A. 3
• B. 0
• C. 8
• D. 3

Answer: (C)

Series
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two alternate series:
2+4 =6,
3-3 =0
6+4 =10,
0-3 =-3
10+4 =14
-3-3 =-6

Question 8

Find wrong number in series:
1, 8, 27, 64, 81, 216, 343

• A. 1
• B. 27
• C. 81
• D. 343

Answer: (C)

Series
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cubes of natural numbers
81 is not the cube of desired number

Question 9

Find wrong number in series:
4, 5, 7, 12, 19, 35

• A. 12
• B. 19
• C. 35

Answer: (A)

Series
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4+2⁰=5
5+2¹=7
7+2²=11
11+2³=19
19+2⁴=35

Question 10

Find wrong number in series:
23, 29, 31, 33, 41, 43, 47

• A. 29
• B. 33
• C. 41
• D. 47

Answer: (B)

Series
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prime numbers from 23