Mathematics · Number System

यदि 4-अंकों की एक संख्या 5k21, 9 से विभाज्य है, तो अंक 'k' का मान क्या है?

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यदि 4-अंकों की एक संख्या 5k21, 9 से विभाज्य है, तो अंक 'k' का मान क्या है?

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यदि 4-अंकों की एक संख्या 5k21, 9 से विभाज्य है, तो अंक 'k' का मान क्या है?

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