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7 चा वर्ग आणि 6 चा वर्ग यांमधील फरक कोणत्या संख्येएवढा आहे?

A13
B11
C12
D14
Answer & Solution
Correct answer: A. 13
n वर्ग वजा (n-1) वर्ग यांमधील फरक 2n वजा 1 एवढा असतो, म्हणून n = 7 साठी तो 13 आहे.
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