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Logical Reasoning :: Number Series

Home > Logical Reasoning > Number Series > General Questions

61. Find the number that can be put in place of the question mark.
8,9,11,14,18,23,?

Answer: Option C

Explanation:

Here is no explanation for this answer

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62. Find the number that can be put in place of the question mark.
25,25,22,22,19,19,?

Answer: Option A

Explanation:

Here is no explanation for this answer

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63. Find the number that can be put in place of the question mark.
14,2,12,4,10,6,?

Answer: Option B

Explanation:

Here is no explanation for this answer

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Tags:  IBM

64. Find the number that can be put in place of the question mark.
7,-35,-34,-3,15,16,4, ?, ?

Answer: Option A

Explanation:

7,-35,-34| -3,15,16| 4, -20,-19
multiply by -5 and then add 1

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65. Find the number that can be put in place of the question mark.
2,7,-35,7,12,-60,5,10

Answer: Option B

Explanation:

(2,7,-35) (7,12,-60) (5,10,?)

2+5=7*(-5)= -35
7+5=12*(-5)=-60
5+5=10*(-5)=-50

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66. Find the number that can be put in place of the question mark.
0.03,0.0018,0.00108,0.00648,0.3888, ?

Answer: Option C

Explanation:

0.03*0.06 = 0.0018
0.0018*0.6=0.00108
0.00108*6=0.00648
0.00648*60=0.3888
so next will be
0.3888*600=233.28

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67. Find the number that can be put in place of the question mark.
2,1/3,2/3,6,7,1/2,7/2,14,20,1/5,4,?

Answer: Option D

Explanation:

Divide in Group of 4
(2,1/3,2/3,6)
2*1/3 == 2/3
2divided by1/3 ==6

Simillary in last group
(20,1/5,4)
20*1/5 == 4
20 divided by 1/5 == 100

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68. Find the number that can be put in place of the question mark.
4,11,66,74,370,379,?

Answer: Option B

Explanation:

4+7=11
11*6=66
66+8=74
74*5=370
370+9=379
379*4=1516

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69. Find the number that can be put in place of the question mark.
2/3,5/3,19/6,31/6,23/3,32/3,85/6,?

Answer: Option A

Explanation:

Make Denominators equal of all
4/6,10/6,19/6,31/6,46/6,64/6,85/6,____
Now the numerators are in series of
4,10,19,31,46,64,85,..
Gap between numbers
+6,+9,+12,+15,+18,+21
So 85+24=109 => 109/6

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70. Find the number that can be put in place of the question mark.
4,2,36,4,5,1,36,16,6,3,81,?

Answer: Option C

Explanation:

4,2,/36,/4,/5,1,/36,/16/,6,3,/81,/?
4+2 = 6 -> 6*6 = 36
5+1 = 5 -> 6*6 = 36
6+3 = 9 -> 9*9 = 81
4 -> 4*4 = 16 -> 16*16 = 256

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