Mathematics · LCM and HCF
चार घंटियाँ क्रमशः 6, 8, 9 और 10 सेकंड के अंतराल पर एक साथ बजती हैं। सभी घंटियाँ एक ही समय में एक साथ बजती हैं। कितने मिनट बाद वे घंटियाँ पहली बार फिर से एक साथ बजेंगी?
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