alleryএকটি লিফট 2 নম্বর তলা থেকে শুরু করে 5 তলা ওপরে ওঠে, তারপর 4 তলা নিচে নামে। এটি কোন তলায় আছে?
A3 নম্বর তলা
B4 নম্বর তলা
C2 নম্বর তলা
D5 নম্বর তলা
Answer & Solution
Correct answer: A. 3 নম্বর তলা
মোট পরিবর্তন হলো 2 + 5 - 4 = 3 নম্বর তলা।
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