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Question : Directions: Which of the following numbers will replace the question mark (?) in the given series?
7, 7, 5, 15, 11, 55, 49, 343, ?

Option 1: 335

Option 2: 293

Option 3: 194

Option 4: 395


Team Careers360 7th Jan, 2024
Answer (1)
Team Careers360 21st Jan, 2024

Correct Answer: 335


Solution : Given:
7, 7, 5, 15, 11, 55, 49, 343, ?

The pattern is as follows –
7 × 1 = 7; 7 – 2 = 5; 5 × 3 = 15; 15 – 4 = 11; 11 × 5 = 55; 55 – 6 = 49; 49 × 7 = 343; 343 – 8 = 335

So, the missing number of the series is 335. Hence, the first option is correct.

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