hartnn
Try this :
How many 5 digit numbers can be formed by using 0,1,2,3,4,5 without repetition, such that the number is divisible by 3.



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sauravshakya
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1,2,3,4,5====> 5!
0,1,2,4,5====>4*4!
Thus, the answer will be 5! + 4*4!

hartnn
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others are welcome to answer

ujjwal
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5*5*4*3*2 ways!

hartnn
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if thats your final answer, then its incorrect.

hartnn
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after reading properly, what u got ?

hartnn
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yes :)

ujjwal
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Learned something new today!

ujjwal
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Not totally new though!