একটি সংখ্যার একক স্থানীয় মান a এবং দশম স্থানীয় মান b হলে সংখ্যাটি কত?
A. 10ab
B. 10a +b
C. a + 10b
D. ab +10
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সঠিক উত্তরঃ
C.
a + 10b
Explanation:
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