allery20 তকৈ সৰু মৌলিক সংখ্যা কেইটা আছে?
A8
B6
C9
D7
Answer & Solution
Correct answer: A. 8
20 তকৈ সৰু মৌলিক সংখ্যাবোৰ হ'ল 2, 3, 5, 7, 11, 13, 17 আৰু 19, অৰ্থাৎ মুঠ আঠটা।
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