Question : Directions: Which of the following numbers will replace the question mark (?) in the given series? 57, 54, 52, 49, 47, 44, 42, ?
Option 1: 40
Option 2: 27
Option 3: 39
Option 4: 47
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Correct Answer: 39
Solution : Given: 57, 54, 52, 49, 47, 44, 42, ?
In the above-given series, subtract 3 and 2 alternately from the previous number to obtain the next number. 57 – 3 = 54; 54 – 2 = 52; 52 – 3 = 49; 49 – 2 = 47; 47 – 3 = 44; 44 – 2 = 42; 42 – 3 = 39
So, the missing number of the series is 39. Hence, the third option is correct.
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