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Reasoning Aptitude > Logical Reasoning

NUMBER AND LETTER SERIES : LOGICAL REASONING MCQs

Number Series, Letter Series

Total Questions : 300 | Page 9 of 30 pages
Question 81. 15   11   20   400 8     12   10 If the resultant of the second set of number is divided by the resultant of the first set of number what will be the outcome?
  1.    196
  2.    200
  3.    19
  4.    None of these
 Discuss Question
Answer: Option D. -> None of these


R1 = 15 11 20 400                           Now R2=8      =(15-11)20 .400                                      =(8x12).1210      =(4x20) 400                                             =96x10 10       =80        400                                           = 960       = 400/80 =5

Required
outcome =R2/R1 = 960/5 = 192.


Question 82. 13   11   4 17   13   12 The resultant of the first set of number is multiplied by .the resultant of the second set of number what will be the outcome?
  1.    48
  2.    96
  3.    69
  4.    75
 Discuss Question
Answer: Option B. -> 96


R1= 13 11 4                                                    R2=17 13 12
= (13-11) 4                                                      =(17-13) 12
= (4/2) = 2                                                         = 4x12  Required outcome =R1x R2 = 2x48 =96


Question 83. 8 16 16 14 13 11 12 144 What is the difference between the resultant of the first set of number and the second set of numbers?
  1.    222
  2.    210
  3.    118
  4.    None of these
 Discuss Question
Answer: Option D. -> None of these


R1= 816 1614                                   R2= 13 11 12 144  =(16/8) 16/4                                          =(13-11) 12 144
= 2 16/4 = 212 144                                 =(16/2) 14  =(2x12) 144                                                  =8 14            = 24 144                                                            =(8x14) = 112 =24 144                                    =(144/24)= 6
 Required difference = R1-R2 = 122-6 = 116


Question 84. 19 15 12 15 12 23 16 If the resultant of the number is subtracted from the resultant of the first set of numbers what will be the outcome?
  1.    44
  2.    92
  3.    29
  4.    43
 Discuss Question
Answer: Option A. -> 44


R1= 19 15 12                                             R2= 15 12 2316
= (19-15) 12                                          =(15+12) 2316  =4 12                                                   = (27-23)16  =(4x12)=48                                           =4 16
=(16/4) = 4
 Required outcome =R1-R2 = 48-4 =44


Question 85. What number should come next?
2   13   27   113   561   3369   23581
  1.    13
  2.    27
  3.    113
  4.    561
  5.    3369
 Discuss Question
Answer: Option E. -> 3369


2 13 27 113 561 3369 23581
Here 2x2+7 =11 11x3-6 =27 
=> 27x4+5 =113 113x5-4 =561 
=> 561x6+3 = 3369 3369x7-2 =23581


Question 86. What number should come next?
1   3   6   11   20   39   70
  1.    3
  2.    39
  3.    11
  4.    20
  5.    6
 Discuss Question
Answer: Option D. -> 20


1   3   6   11   20   39   70
Here 1x2+1 =3  3x2+0 =6 
 6x2-1 = 11   11x2-2 =20 
 20x2-3 =37   37x2-4 =70


Question 87. What number should come next?
2 3 6 18 109 1944 209952
  1.    3
  2.    6
  3.    18
  4.    109
  5.    1944
 Discuss Question
Answer: Option E. -> 1944


2   3   6   18   109   1944   209952 
 Here 2x3 =6, 3x6 = 18:6x18 =108 
18x108 =1944, 108x1944 = 209952


Question 88. What number should come next?
50 51 47 56 42 65 29
  1.    51
  2.    47
  3.    56
  4.    42
  5.    65
 Discuss Question
Answer: Option E. -> 65


50  51  47  56  42  65  29
Here 50+12 =51 ; 
51- 22 =47,
47+32 = 56 
56-42 =40 ; 
40+52 = 65 ; 
65- 62 = 29


Question 89. 1   2      8       33   148   740   4626 2  (A)  (B)     (C)    (D)    (E)    (F) What will come in place of (D)?
  1.    156
  2.    164
  3.    168
  4.    152
  5.    None of these
 Discuss Question
Answer: Option E. -> None of these


The series is *1+12 , *2+22 , *3 +32 , *4+42


Question 90. What number should come next?
4 5 9 29 111 556 335
  1.    5
  2.    9
  3.    29
  4.    111
 Discuss Question
Answer: Option C. -> 29


*1+1 , *2-1, *3+1 , *4-1 = 29


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