allery7 مربع اور 6 مربع کے درمیان فرق کس نمبر کے برابر ہے؟
A13
B11
C12
D14
Answer & Solution
Correct answer: A. 13
فرق n مربع مائنس (n-1) مربع 2n مائنس 1 کے برابر ہے، لہذا n = 7 کے لیے یہ 13 ہے۔
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