# Placement Questions & Answers :: IBM

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31. Find the next term of the following series.

1370 , 1320 , 1070 , -180 ?

**Answer:**** Option C **

**Explanation:**

1370,1320,1070,-180,?

1370-50*(5^0)=1320

1320-50*(5^1)=1070

1070-50*(5^2)=-180

-180-50*(5^3)=-6430.

So next occurrence in series will be -6430.

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32. Find the next term of the following series.

32,0.2,160,15,0.5,30,28,0.7,?

**Answer:**** Option C **

**Explanation:**

Break the series as below

32,0.2,160 / 15,0.5,30 / 28,0.7,?

32 / 0.2 => 320/2= 160,

similarly for next

15 / 0.5 => 150/5 = 30

28 / 0.7 => 280/7 = 40

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33. Find the next term of the following series.

3,8,12,48,29 ?

**Answer:**** Option C **

**Explanation:**

1^2+2=3

2^2*2=8

3^2+3=12

4^2*3=48

5^2+4=29

6^2*4=144

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34. Find the next term of the following series.

1,2,3,5,7,10,13,17,?

**Answer:**** Option A **

**Explanation:**

In the given series find the difference between numbers.

1, 2 difference = 1

2, 3 difference = 1

3, 5 difference = 2

5, 7 difference = 2

7, 10 difference = 3

10, 13 difference = 3

13, 17 difference = 4

So next number will be 17 + 4 = 21

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35. Find the next term of the following series.

21,24,25,26,22,25,26,?

**Answer:**** Option C **

**Explanation:**

21 / 24,25,26 / 22 / 25,26 / 23

+1 in First sub-series

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36. Find the next terms of the following series.

33,8,41,46,21,67,72,47,119,124,?,?

**Answer:**** Option A **

**Explanation:**

Arrange the series as below

(33,8,41),(46,21,67),(72,47,119),(124,?,?)

For each group:

33 - 8 = 25

33 + 8 = 41

Similarly for other groups

46 - 21 = 25

46 + 21 = 67

so for next occurrence

124 - 25 = 99

124 + 99 = 223

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37. Find the next term of the following series.

21,22,24,27,31,?

**Answer:**** Option E **

**Explanation:**

+1, +2, +3, +4, +5

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38. Find the next term of the following series.

36,22,35,23,34,24,33,?

**Answer:**** Option D **

**Explanation:**

Break the series as below.

__,22,__,23,__,24,__,25

36,__,35,__,34,__,33,

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39. Find the next term of the following series.

23,36,37,25,40,41,27,?

**Answer:**** Option C **

**Explanation:**

23 / 36,37 / 25 / 40,41 / 27 / 44

+3 in second sub-series

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40. If log 27 = 1.431, then the value of log 9 is:

**Answer:**** Option C **

**Explanation:**

Here is no explanation for this answer

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Here is the list of questions asked in IBM Aptitude Test Question with Answers IBM Mock Test page 4. Practice IBM Written Test Papers with Solutions and take Q4Interview IBM Online Test Questions to crack IBM written round test. Overall the level of the IBM Online Assessment Test is moderate. Only those candidates who clear the written exam will qualify for the next round, so practic all the questions here and take all the free tests before going for final selection process of IBM