alleryএকটি সংখ্যাকে তিনগুণ করা হয়, তারপর 4 দ্বারা হ্রাস করে 23 দেয়। সংখ্যাটা কি?
A7
B10
C8
D9
Answer & Solution
Correct answer: D. 9
অপারেশনগুলিকে পূর্বাবস্থায় ফিরিয়ে আনলে পাওয়া যায় (23 + 4) ÷ 3 = 9।
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