alleryএকজন ব্যক্তি একটি 9-তলার ভবনের শীর্ষ তলা থেকে শুরু করে 5 তলা নিচে নামেন এবং তারপর 2 তলা ওপরে ওঠেন। তিনি কোন তলায় আছেন?
A6
B7
C4
D5
Answer & Solution
Correct answer: A. 6
9 নম্বর তলা থেকে 5 বাদ দিলে 4 নম্বর তলা হয়, এবং আরও 2 তলা ওপরে উঠলে 6 নম্বর তলায় পৌঁছানো যায়।
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