(0,1,2,3,4,5,6,7) से repetition बिना (5)-digit even numbers बनाने में (0) को last digit case अलग क्यों लिया जाता है?
Why is the case with (0) as the last digit treated separately when forming (5)-digit even numbers without repetition from (0,1,2,3,4,5,6,7)?
Explanation opens after your attempt
A. क्योंकि (0) last में valid है पर first में invalid हैBecause (0) is valid at the last place but invalid at the first place
Concept
In an even number, (0) may be the unit digit but cannot be the leading digit. In exams keep zero cases separate in digit problems.
Why this answer is correct
The correct answer is A. क्योंकि (0) last में valid है पर first में invalid है / Because (0) is valid at the last place but invalid at the first place. In an even number, (0) may be the unit digit but cannot be the leading digit. In exams keep zero cases separate in digit problems.
Exam Tip
Even number में (0) unit place पर आ सकता है लेकिन leading digit नहीं बन सकता। परीक्षा में digit problems में zero cases अलग रखें।
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