Number Series Questions and Answers updated daily – Aptitude



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

Number Series Questions

1. In the below given sequence, what should be the Missing number ?

67, 54, 41, X , 15, 2



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Correct Ans:28
Explanation:
The given series is -- 67, 54, 41, X , 15, 2
Consecutive numbers decreases by 13
Following this pattern, the Missing Number X should decrease by 13 from the previous number.
When we subtract 13 to the number before X (i.e 41) we get 41--13=28


2. A Computer program gave the following output. Can you predict the Missing number in the computer output ?

67, 80, 93, X , 119, 132



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Correct Ans:106
Explanation:
The given series is -- 67, 80, 93, X , 119, 132
Consecutive numbers increases by 13
Following this pattern, the Missing Number X should increase by 13 from the previous number.
When we add 13 to the number before X (i.e 93) we get 93+13=106


3. A professor wrote down the below series in a classroom. He wants his students to find the Missing number. Can you solve it ?

67, 56, 45, X , 23, 12



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Correct Ans:34
Explanation:
The given series is -- 67, 56, 45, X , 23, 12
Consecutive numbers decreases by 11
Following this pattern, the Missing Number X should decrease by 11 from the previous number.
When we subtract 11 to the number before X (i.e 45) we get 45--11=34


4. Below Numbers follow a particular pattern. Can you find the Missing number in the below pattern?

67, 78, 89, X , 111, 122



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Correct Ans:100
Explanation:
The given series is -- 67, 78, 89, X , 111, 122
Consecutive numbers increases by 11
Following this pattern, the Missing Number X should increase by 11 from the previous number.
When we add 11 to the number before X (i.e 89) we get 89+11=100


5. In the given series, can you find the Missing number ?

67, 58, 49, X , 31, 22



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Correct Ans:40
Explanation:
The given series is -- 67, 58, 49, X , 31, 22
Consecutive numbers decreases by 9
Following this pattern, the Missing Number X should decrease by 9 from the previous number.
When we subtract 9 to the number before X (i.e 49) we get 49--9=40


6. Fourth number is missing in the below series. Can you find the Fourth number in the below series ?

67, 76, 85, X , 103, 112



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Correct Ans:94
Explanation:
The given series is -- 67, 76, 85, X , 103, 112
Consecutive numbers increases by 9
Following this pattern, the Missing Number X should increase by 9 from the previous number.
When we add 9 to the number before X (i.e 85) we get 85+9=94


7. Can you find the the missing number in the below series

67, 60, 53, X , 39, 32



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Correct Ans:46
Explanation:
The given series is -- 67, 60, 53, X , 39, 32
Consecutive numbers decreases by 7
Following this pattern, the Missing Number X should decrease by 7 from the previous number.
When we subtract 7 to the number before X (i.e 53) we get 53--7=46


8. Find the Missing number in the the below series

67, 74, 81, X , 95, 102



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Correct Ans:88
Explanation:
The given series is -- 67, 74, 81, X , 95, 102
Consecutive numbers increases by 7
Following this pattern, the Missing Number X should increase by 7 from the previous number.
When we add 7 to the number before X (i.e 81) we get 81+7=88


9. Which number should come in place of the missing Number ?

69, 88, 107, X , 145, 164



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Correct Ans:126
Explanation:
The given series is -- 69, 88, 107, X , 145, 164
Consecutive numbers increases by 19
Following this pattern, the Missing Number X should increase by 19 from the previous number.
When we add 19 to the number before X (i.e 107) we get 107+19=126


10. What should come in place of X in the below number series?

69, 54, 39, X , 9, -6



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Correct Ans:24
Explanation:
The given series is -- 69, 54, 39, X , 9, -6
Consecutive numbers decreases by 15
Following this pattern, the Missing Number X should decrease by 15 from the previous number.
When we subtract 15 to the number before X (i.e 39) we get 39--15=24


11. Output of a particular program follows the below pattern. Can you find the Missing number ?

69, 84, 99, X , 129, 144



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Correct Ans:114
Explanation:
The given series is -- 69, 84, 99, X , 129, 144
Consecutive numbers increases by 15
Following this pattern, the Missing Number X should increase by 15 from the previous number.
When we add 15 to the number before X (i.e 99) we get 99+15=114


12. In the below given sequence, what should be the Missing number ?

69, 56, 43, X , 17, 4



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Correct Ans:30
Explanation:
The given series is -- 69, 56, 43, X , 17, 4
Consecutive numbers decreases by 13
Following this pattern, the Missing Number X should decrease by 13 from the previous number.
When we subtract 13 to the number before X (i.e 43) we get 43--13=30


13. A Computer program gave the following output. Can you predict the Missing number in the computer output ?

69, 82, 95, X , 121, 134



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Correct Ans:108
Explanation:
The given series is -- 69, 82, 95, X , 121, 134
Consecutive numbers increases by 13
Following this pattern, the Missing Number X should increase by 13 from the previous number.
When we add 13 to the number before X (i.e 95) we get 95+13=108


14. A professor wrote down the below series in a classroom. He wants his students to find the Missing number. Can you solve it ?

69, 58, 47, X , 25, 14



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Correct Ans:36
Explanation:
The given series is -- 69, 58, 47, X , 25, 14
Consecutive numbers decreases by 11
Following this pattern, the Missing Number X should decrease by 11 from the previous number.
When we subtract 11 to the number before X (i.e 47) we get 47--11=36


15. Below Numbers follow a particular pattern. Can you find the Missing number in the below pattern?

69, 80, 91, X , 113, 124



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Correct Ans:102
Explanation:
The given series is -- 69, 80, 91, X , 113, 124
Consecutive numbers increases by 11
Following this pattern, the Missing Number X should increase by 11 from the previous number.
When we add 11 to the number before X (i.e 91) we get 91+11=102


16. In the given series, can you find the Missing number ?

69, 60, 51, X , 33, 24



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Correct Ans:42
Explanation:
The given series is -- 69, 60, 51, X , 33, 24
Consecutive numbers decreases by 9
Following this pattern, the Missing Number X should decrease by 9 from the previous number.
When we subtract 9 to the number before X (i.e 51) we get 51--9=42


17. Fourth number is missing in the below series. Can you find the Fourth number in the below series ?

69, 78, 87, X , 105, 114



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Correct Ans:96
Explanation:
The given series is -- 69, 78, 87, X , 105, 114
Consecutive numbers increases by 9
Following this pattern, the Missing Number X should increase by 9 from the previous number.
When we add 9 to the number before X (i.e 87) we get 87+9=96


18. Can you find the the missing number in the below series

69, 62, 55, X , 41, 34



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Correct Ans:48
Explanation:
The given series is -- 69, 62, 55, X , 41, 34
Consecutive numbers decreases by 7
Following this pattern, the Missing Number X should decrease by 7 from the previous number.
When we subtract 7 to the number before X (i.e 55) we get 55--7=48


19. Find the Missing number in the the below series

69, 76, 83, X , 97, 104



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Correct Ans:90
Explanation:
The given series is -- 69, 76, 83, X , 97, 104
Consecutive numbers increases by 7
Following this pattern, the Missing Number X should increase by 7 from the previous number.
When we add 7 to the number before X (i.e 83) we get 83+7=90


20. Which number should come in place of the missing Number ?

95, 114, 133, X , 171, 190



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Correct Ans:152
Explanation:
The given series is -- 95, 114, 133, X , 171, 190
Consecutive numbers increases by 19
Following this pattern, the Missing Number X should increase by 19 from the previous number.
When we add 19 to the number before X (i.e 133) we get 133+19=152



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