alleryدوگنا کریں اور ہر قدم پر ایک شامل کریں: 1, 3, 7, 15, 31۔ اگلا نمبر کون سا ہے؟
A62
B63
C61
D64
Answer & Solution
Correct answer: B. 63
ہر اصطلاح پچھلے جمع ایک سے دوگنا ہے، لہذا 31 x 2 + 1 = 63۔
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