allery100, 90, 80, 70, ... অনুক্ৰমত ইয়াৰ পিছৰ পদটো কি হ'ব?
A50
B65
C60
D55
Answer & Solution
Correct answer: C. 60
শৃংখলাটো প্ৰতিটো পদক্ষেপতে 10 কৈ হ্ৰাস পাইছে, গতিকে 70 - 10 = 60।
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