alleryকোন জোড়াটি পরস্পর যমজ মৌলিক সংখ্যা, অর্থাৎ যাদের অন্তর 2?
A19 এবং 25
B13 এবং 15
C11 এবং 13
D17 এবং 21
Answer & Solution
Correct answer: C. 11 এবং 13
11 এবং 13 উভয়ই মৌলিক সংখ্যা এবং তাদের পার্থক্য 2, অন্যদিকে 15, 21 এবং 25 হল যৌগিক সংখ্যা।
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