# 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

1281. Can you find the the missing number in the below series
85, 58, X , 4, -23

Correct Ans:31
Explanation:
Solution is
The given series is 85, 58, X , 4, -23
Consecutive numbers decreases by 27
Following this pattern, the Missing Number X should decrease by 27 from the previous number.
When we subract 27 to the number before X
(i.e 58) we get 58 - 27 = 31
Workspace

1282. Find the Missing number in the the below series
112, 139, 166, X , 220, 247

Correct Ans:193
Explanation:
Solution is
The given series is 112, 139, 166, X , 220, 247
Consecutive numbers increases by 27
Following this pattern, the Missing Number X should increase by 27 from the previous number.
When we add 27 to the number before X
(i.e 166) we get 166 + 27 = 193
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1283. What number comes next :
3, 4, 6, 9, 13, 18, ?

Correct Ans:24
Explanation:
Solution is
Given numbers

3, 4, 6, 9, 13, 18, ?
4 = 3 + 1
6 = 4 + 2
9= 6 + 3
13 = 9 + 4
18 = 13 + 5
Next term, 18 + 6 = 24
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1284. What number comes next : 1023 , 1088 , 1155 , 1224 , ... ?

Correct Ans:1295
Explanation:
Solution is
Given

1023 , 1088 , 1155 , 1224
First number is 32 x 32 - 1 = 1023
Second number is 33 x 33 - 1 = 1088
Third number is 34 x 34 - 1 = 1155
Fourth number is 35 x 35 - 1 = 1224
Next number has to 36 x 36 - 1 = 1295
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1285. What number comes next : 899 , 960 , 1023 , 1088 , ... ?

Correct Ans:1155
Explanation:
Solution is
Given

899 , 960 , 1023 , 1088
First number is 30 x 30 - 1 = 899
Second number is 31 x 31 - 1 = 960
Third number is 32 x 32 - 1 = 1023
Fourth number is 33 x 33 - 1 = 1088
Next number has to 34 x 34 - 1 = 1155
Workspace

1286. What number comes next : 901 , 962 , 1025 , 1090 , ... ?

Correct Ans:1157
Explanation:
Solution is
Given

901 , 962 , 1025 , 1090
First number is 30 x 30 + 1 = 901
Second number is 31 x 31 + 1 = 962
Third number is 32 x 32 + 1 = 1025
Fourth number is 33 x 33 + 1 = 1090
Next number has to 34 x 34 + 1 = 1157
Workspace

1287. What number comes next : 290 , 325 , 362 , 401 , ... ?

Correct Ans:442
Explanation:
Solution is
Given

290 , 325 , 362 , 401
First number is 17 x 17 + 1 = 290
Second number is 18 x 18 + 1 = 325
Third number is 19 x 19 + 1 = 362
Fourth number is 20 x 20 + 1 = 402
Next number has to 21 x 21 + 1 = 442
Workspace

1288.

Correct Ans:
Explanation:
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1289. If 432 is added to some number the answer we obtained is 2312, find that number

Correct Ans:463
Explanation:
Solution is
Given

432 is added to some number the answer we obtained is 2312
Let the number be x
x + 432 = 2312
x+ 1849 = 2312
x = 2312 - 1849 = 463
x=463
Workspace

1290. What is the least number to be added with 2016 to make it perfect square?

Correct Ans:9
Explanation:
Solution is
Given

least number to be added with 2016 to make it perfect square
We know that 45 x 45 = 2025
If we add 9 to 2016 we get 2025 which is a perfect square
Workspace

1291. 123, 146, 171, 198, ?

Correct Ans:227
Explanation:
123 = 112 + 2 , 146 = 122 + 2 , 171 = 132 + 2 , 198 = 142 + 2 now, 152+2 = 227
Workspace

1292. 6, 12, 20, 30, ?

Correct Ans:42
Explanation:
6 = (2 x 3), 12 =(3 x 4), 20 =(4 x 5), 30 =(5 x 6), => 6 x 7 = 42
Workspace

1293. 2, 10, 17, 26, ?

Correct Ans:37
Explanation:
2, 10, 17, 26 => 12 + 1, 22 +1 , 32 + 1, 42 + 1 , 52 + 1, the next number should 62 + 1 = 37
Workspace

1294. 5, 12, 23, 38, ?

Correct Ans:57
Explanation:
Given, 5, 12, 23, 38 , x 21 ? 5 = 7 , 23 ? 12 = 11 = 7 + 4, 38 ? 23 = 15 = 11 + 4 x ? 38 = 15 + 4 => x ? 38 = 19 => x = 19 + 38 = 57
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1295. In the given sequence, 3, 7, 13, k,31, 43. What should be the value of k?

Correct Ans:21
Explanation:
3, 7, 13, k, 31, 43 7 ? 3 = 4 13 ? 7 = 6 K ? 13 = ? (it has to be 8) => k = 13 + 8 => k = 21 31 ? k = ? ( it has to be 10) 43 ? 31 = 12
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