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1. In the given series, which number will come next: 91, 86 , 76, 61 , ______?
- A. 31
- B. 31
- C. 31
- D. 31
Answer: Option C
Explanation:
ধারা : 91 , 86, 76, 61
ব্যবধান : - 5, - 10, - 15, - 20
পরবর্তী সংখ্যা = 61 - 20 = 41
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