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دیئے گئے متبادلات میں سے متعلقہ نمبر منتخب کریں: 7 : 49 :: 9 : ?

A72
B81
C90
D99
Answer & Solution
Correct answer: B. 81
دوسرا نمبر پہلے کا مربع ہے: 7 مربع 49 ہے، اور 9 مربع 81 ہے۔
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