Question : Directions: In the following question a series is given, with one number missing. Select the missing number from the given series.
283, 94, 31, 10, ?
Option 1: 3
Option 2: 4
Option 3: 5
Option 4: 7
Correct Answer: 3
Solution :
Given:
283, 94, 31, 10, ?
Subtract 1 from the previous term and then divide the resultant by 3 to get the next term of the series –
(283 – 1) ÷ 3 = 282 ÷ 3 = 94
(94 – 1) ÷ 3 = 93 ÷ 3 = 31
(31 – 1) ÷ 3 = 30 ÷ 3 = 10
(10 – 1) ÷ 3 = 9 ÷ 3 = 3
So, 3 is the missing term of the series. Hence, the first option is correct.
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