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Logical Reasoning :: Number Series

Home > Logical Reasoning > Number Series > General Questions

21. Find the next term of the following series.
18,24,5,21,27,8,17,23,4,24,30,?

Answer: Option B

Explanation:

18 3=21             24 3=27                5 3=8



21-4=17             27-4=23                  8-4=4



17 7=24           23 7=30                  4 7=11



 

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22. Find the next term of the following series.
49,7,98, 16,4,48, 9,3,36, 25,5,?

Answer: Option B

Explanation:

The correct pattern is + 6^3, + 5^3, + 4^3, + 3^3,

So, 521 is wrong and must be replaced by (498 + 3^3) i.e. 525.

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23. Find the next term of the following series.
3,5,2,100,4,7,3,196,1,6,5,?

Answer: Option A

Explanation:

3+5+2=10, 10^2=100

4+7+3=14,14^2=196

1+6+5=12,12^2=144

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24. Find the number that can be put in place of the question mark.
2,6,18,54,162,486,?

Answer: Option D

Explanation:

2*3=6

6*3=18

18*3=54


54*3=162

162*3=486

486*3=1458


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25. Find the number that can be put in place of the question mark.
4,20,35,49,62,74,?

Answer: Option B

Explanation:


4+16=20

20+15=35

35+14=49

49+13=62


62+12=74


74+11=85

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26. Find the number that can be put in place of the question mark.
10,18,15,23,20,28,?

Answer: Option C

Explanation:

Here is no explanation for this answer

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27. Find the number that can be put in place of the question mark.
4,10,8,14,12,18,?

Answer: Option D

Explanation:

Here is no explanation for this answer

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28. Find the number that can be put in place of the question mark.
25 10,15,12,17,14,10,?

Answer: Option B

Explanation:

Here is no explanation for this answer

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29. Find the number that can be put in place of the question mark.
121, 102, 84, 72, 61, 54,?

Answer: Option C

Explanation:

5.5 = 2.2 * 2.5
8 = 5.5 + 2.5
36 = 8 * 4.5
40.5 = 36 + 4.5
263.25 = 40.5 * 6.5
The next number should be: 263.25 + 6.5 = 269.75.

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30. Find the number that can be put in place of the question mark.
764, 620, 520, 456, 400, 404,?

Answer: Option B

Explanation:

Here is no explanation for this answer

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