Question : Directions: Which number will replace the question mark (?) in the following series? 57, 50, 55, 52, ?
Option 1: 50
Option 2: 53
Option 3: 51
Option 4: 55
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Correct Answer: 53
Solution : Given: 57, 50, 55, 52, ?
Subtract and add the consecutive odd numbers alternatively (starting from 7) in decreasing order from each term to get the required missing number – 57 – 7 = 50, 50 + 5 = 55, 55 – 3 = 52, 52 + 1 = 53
So, the required missing number in the series is 53. Hence, the second option is correct.
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Question : Directions: Which number will replace the question mark (?) in the given series? 115,107, 98, 88, 77, 65,?
Option 1: 52
Option 2: 50
Option 3: 61
Option 4: 57
Question : Directions: Select the number that will replace the question mark (?) in the following series. 32, ?, 132, 267, 538
Option 1: 97
Option 3: 65
Option 4: 75
Question : Directions: Select the number that will replace the question marks (?) in the following series. 28, ?, ?, 69, 88, 111, 140, 171
Option 1: 39, 52
Option 2: 38, 50
Option 3: 29, 52
Option 4: 39, 59
Question : Directions: Which number will replace the question mark (?) in the following series? 1, 1, 2, 4, 7, 11, 16, ?, 29, 37
Option 1: 17
Option 2: 23
Option 3: 22
Option 4: 19
Question : Directions: Which number will replace the question mark (?) in the given series? 55, 68, 81, 94, ?, 120
Option 1: 105
Option 2: 107
Option 3: 111
Option 4: 109
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