How many 4 digit numbers can you form with the numerals 2 6 9 5 without repeating any digit?
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12 numbers can be formed
_ _ _ 2
possibility of 1st blank=3
Possibility of 2nd blank =2
Possibility of 3rd blank=1
Total=3×2×1=6
Similar case for_ _ _ 6
Total=3×2×1=6
Grand total=12
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