Find the number of 4digit positive integers that are divisible by2
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Let abcdabcd be the required number.For the product of digits of this number is to be divisible by 3,atleast one digit has to be 3,6 or 9.
Total there are 9000 four digit numbers.
The possible combinations are 3 and three other digits,33 and two other digits,333 and one other digit,3333,6 and three other digits,66 and two other digits,666 and one other digit,6666,9 and three other digits,99 and two other digits,999 and one other digit,9999.
Total there are 9000 four digit numbers.
The possible combinations are 3 and three other digits,33 and two other digits,333 and one other digit,3333,6 and three other digits,66 and two other digits,666 and one other digit,6666,9 and three other digits,99 and two other digits,999 and one other digit,9999.
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