Mathematics · LCM and HCF

दो संख्याओं का महत्तम समापवर्तक (HCF) 20 है और उनका लघुत्तम समापवर्त्य (LCM) 400 है। यदि उनमें से एक संख्या 80 है, तो दूसरी संख्या क्या है?

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