To which mountain range belong both Istor-o-Nal in the Hindu Kush and Mount Everest in Nepal and Tibet?
Mount Everest: Mount Everest, known in Nepali as Sagarmāthā and in Tibetan as Chomolungma, is Earth's highest mountain, located in the Mahalangur Himal sub-range of the Himalayas. Mount Everest:  The international border between China (Tibet Autonomous Region) and Nepal runs across its summit point.
i don't know