Question : Directions: In the following question, select the missing number from the given series.
36, 18, 54, 27, 81, ?, 121.5
Option 1: 40.5
Option 2: 41.5
Option 3: 40
Option 4: 38
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Correct Answer: 40.5
Solution :
Given:
36, 18, 54, 27, 81, ?, 121.5
The pattern is as follows –
36 ÷ 2 = 18; 18 × 3 = 54; 54 ÷ 2 = 27; 27 × 3 = 81; 81 ÷ 2 = 40.5; 40.5 × 3 = 121.5
So, the missing number of the series is 40.5. Hence, the first option is correct.
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