Question : Directions: In the following question a series is given, with one number missing. Choose the correct alternative from the given ones that will complete the series.
5, 10, 30, ?, 600, 3600
Option 1: 120
Option 2: 100
Option 3: 90
Option 4: 60
Correct Answer: 120
Solution :
Given:
5, 10, 30, ?, 600, 3600
Multiply each term by consecutive natural numbers –
5 × 2 = 10; 10 × 3 = 30; 30 × 4 = 120; 120 × 5 = 600; 600 × 6 = 3600
So, the missing number is 120. Hence, the first option is correct.
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