Question : Directions: Which number will replace the question mark (?) in the following series? 5, 12, 26, ?, 110, 222
Option 1: 52
Option 2: 56
Option 3: 54
Option 4: 50
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Correct Answer: 54
Solution : Given: 5, 12, 26, ?, 110, 222
Multiply the number by 2 and then add 2 to the resultant, to get the required missing number in the series. 5 × 2 + 2 = 12; 12 × 2 + 2 = 26; 26 × 2 + 2 = 54; 54 × 2 + 2 = 110; 110 × 2 + 2 = 222
So, 54 is the missing number in the series. Hence, the third option is correct.
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