Question 1

How many three digit numbers are there in which all the digits are odd?

Solution

1,3,5,7,9 are the odd digits
as all the digits are to be odd
In a three digit number each place can be filled with 5 numbers i.e either 1,3,5,7 or 9
and so 5*5*5=125 numbers

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SSC CGL Tier-2 18-February-2018 Maths

How many three digit numbers are there in which all the digits are odd?

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