આપેલા વિકલ્પોમાંથી સંબંધિત સંખ્યા પસંદ કરો: 7 : 49 :: 9 : ?
A72
B81
C90
D99
Answer & Solution
Correct answer: B. 81
બીજી સંખ્યા એ પહેલી સંખ્યાનો વર્ગ છે: 7 નો વર્ગ 49 છે, અને 9 નો વર્ગ 81 છે.
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