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7 वर्ग आनी 6 वर्ग हांचेमदलो फरक खंयच्या आंकड्या इतलो आसता?

A13
B11
C12
D14
Answer & Solution
Correct answer: A. 13
फरक n वर्ग उणे (n-1) वर्गीकरण 2n उणे 1 इतलो आसता, देखून n = 7 खातीर तो 13.
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