how many four digir odd numbers can be formed by the number 1,2,3,4 once only
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The ones digit can be filled in two ways by using 1 and 3, and the tens digit in 3 ways(since repetition is not allowed), hundres in 2 ways and the thousands in 1 way. So the required number of 4 digit numbers= 2×3×2×1 = 12.
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no because the odd number only divisible by on table
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