alleryচারটি পদের একটি শ্রেণি 7 দিয়ে শুরু হয় এবং প্রতি ধাপে 3 করে কমে। শেষ পদটি কী?
A-1
B-2
C-3
D4
Answer & Solution
Correct answer: B. -2
পদগুলি হল 7, 4, 1, -2, তাই চতুর্থ পদটি হল -2।
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