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Number of all four digit nos. …

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Number of all four digit nos. having diff. digits formed of the digits 1,2,3,4 and 5 and divisible by 4 is.

Posted by Rounak Soni 6 years ago

CBSE > Class 11 > Mathematics

1 answers

Soumyadeep Paul 6 years ago

There are 6 ways for this. For divisibilty by 4, the last two digits must be divisible by 4 . So in case 1, lets take 1 in units place and 2 in tens place. So it forms 12 in last two digits of the four digit no. , which is divisible by 4. Now, we've used up 2 out of 5 digits, so we are left with 3 digits, so the possible ways are 3x2=6 ways. In case 2, if we take 24 in last two digits , we again get same answer of 6 ways

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