Reasoning Aptitude > Logical Reasoning
NUMBER AND LETTER SERIES : LOGICAL REASONING MCQs
Number Series, Letter Series
Total Questions : 300
| Page 2 of 30 pages
Answer: Option C. -> 24
- The sequence is +5, +7, …….so 24 is wrong and should be replaced by (17+9) = 26
- The sequence is +5, +7, …….so 24 is wrong and should be replaced by (17+9) = 26
Answer: Option D. -> 256
- The sequence is x2+1, x3+1, x2+1, x3+1, …. So 256 is wrong and must be replaced by (129 x 2 +1 ) = 259
- The sequence is x2+1, x3+1, x2+1, x3+1, …. So 256 is wrong and must be replaced by (129 x 2 +1 ) = 259
Answer: Option B. -> 22
- The pattern is +1, +4, +9, +16, +25,… i.e+12, +22, +3, +42, +52, …. So 22 is wrong and must be replaced by (16+4) = 25
- The pattern is +1, +4, +9, +16, +25,… i.e+12, +22, +3, +42, +52, …. So 22 is wrong and must be replaced by (16+4) = 25
Answer: Option C. -> 64
- Each term is multiplied by 2 and then increased by 2 to obtain the next term. So 64 is wrong and must be replaced by (30 x 2 + 2 )= 62
- Each term is multiplied by 2 and then increased by 2 to obtain the next term. So 64 is wrong and must be replaced by (30 x 2 + 2 )= 62
Answer: Option D. -> 654
- Each term is 4 less than thrice the preceding number. So 654 is the wrong answer and must be replaced by (218 x 3 - 4 = 650
- Each term is 4 less than thrice the preceding number. So 654 is the wrong answer and must be replaced by (218 x 3 - 4 = 650
Answer: Option B. -> 39
- Each number in the series is multiplied by 2 and result increased by 1 to obtain the next number so 39 is wrong and replaced by (15 x 2 + 1) = 31
- Each number in the series is multiplied by 2 and result increased by 1 to obtain the next number so 39 is wrong and replaced by (15 x 2 + 1) = 31
Answer: Option B. -> 46
- 3 is subtracted from each number and result is divided by 2 to obtained the next number, so 46 is wrong and must be replaced by 53.
- 3 is subtracted from each number and result is divided by 2 to obtained the next number, so 46 is wrong and must be replaced by 53.
Answer: Option D. -> 5686
- The first digits of the numbers form the series 1, 2, 3, 4, 5; the second digits form the series 2, 3, 4, 5, 6; the third digits form the series 3, 4, 5, 6,; while the last digits in each of the numbers is 6. So 5686 is wrong and replaced by 5676
- The first digits of the numbers form the series 1, 2, 3, 4, 5; the second digits form the series 2, 3, 4, 5, 6; the third digits form the series 3, 4, 5, 6,; while the last digits in each of the numbers is 6. So 5686 is wrong and replaced by 5676
Answer: Option C. -> 550
- The sequence is x2, x4, x2, x4, ….. so 550 is wrong and must be replaced by (320 x 2) = 640.
- The sequence is x2, x4, x2, x4, ….. so 550 is wrong and must be replaced by (320 x 2) = 640.
Answer: Option B. -> 9
- The given sequence is a combination of two series (1) 3, 8, 13, 18, 23 and (2) 2, 9, 22, 32, 42. The pattern in first series is +5 and in the second series is +10 So 9 is wrong and must be replaced by (2 + 10) = 12
- The given sequence is a combination of two series (1) 3, 8, 13, 18, 23 and (2) 2, 9, 22, 32, 42. The pattern in first series is +5 and in the second series is +10 So 9 is wrong and must be replaced by (2 + 10) = 12
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