allery20 سے کتنے بنیادی نمبر کم ہیں؟
A8
B6
C9
D7
Answer & Solution
Correct answer: A. 8
20 سے نیچے پرائمز 2، 3، 5، 7، 11، 13، 17 اور 19 ہیں، جو آٹھ بنتے ہیں۔
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