alleryএকটি দুই-অঙ্কের সংখ্যা হল 4 তার অঙ্কের যোগফলের গুণ; এটিকে বিপরীত করলে 27 যোগ হয়। সংখ্যা?
A36
B24
C48
D63
Answer & Solution
Correct answer: A. 36
দশ a এবং ইউনিট b এর জন্য, 10a + b = 4(a + b) দেয় b = 2a, এবং 9(b −a) = 27 দেয় 36 নম্বর।
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