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How many (5)-digit numbers divisible by (6) can be formed from digits (0,1,2,3,4,5,6,7) without repetition?अंकों (0,1,2,3,4,5,6,7) से बिना पुनरावृत्ति कितनी (5)-अंकीय संख्याएं (6) से विभाज्य बनेंगी?
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: (966)(966)
The number must be even and its digit sum must be divisible by (3). Divisibility by (6) needs both the (2) and (3) tests.संख्या सम होनी चाहिए और अंकों का योग (3) से विभाज्य होना चाहिए। (6) से विभाज्यता में (2) और (3) दोनों नियम साथ लगते हैं।
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