Question : Directions: Which number will replace the question mark (?) in the following series? 3, 13, 53, 213, ?, 3413
Option 1: 1053
Option 2: 853
Option 3: 953
Option 4: 753
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Correct Answer: 853
Solution : Given: 3, 13, 53, 213, ?, 3413
Multiply each number by 4 and then add 1 to the resultant, to obtain the next number in the series. 3 × 4 + 1 = 13; 13 × 4 + 1 = 53; 53 × 4 + 1 = 213; 213 × 4 + 1 = 853; 853 × 4 + 1 = 3413
So, 853 is the missing number in the series. Hence, the second option is correct.
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Question : Directions: Which number will replace the question mark (?) in the following series? 1, 4, 13, 40, ?, 364
Option 1: 132
Option 2: 121
Option 3: 120
Option 4: 124
Question : Directions: Which number should replace the question mark (?) in the following number series? 642, 598, 554, ?, 466, 422
Option 1: 514
Option 2: 524
Option 3: 500
Option 4: 510
Question : Directions: Which number should replace the question mark (?) in the following number series? 32, 54, 98, 186, ?, 714
Option 1: 452
Option 2: 450
Option 3: 362
Option 4: 354
Question : Directions: Which of the following numbers will replace the question mark (?) in the given series? 11, ?, 20, 29, 41, 56
Option 1: 16
Option 2: 13
Option 3: 15
Option 4: 14
Question : Directions: Which number should replace the question mark (?) in the following number series? 49, 54, 44, 59, ?, 64, 34
Option 1: 51
Option 2: 36
Option 3: 39
Option 4: 44
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