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## Answers

It is a impossible task to get 30 by using these numbers.

odd no. + odd no.= even no.

_ + _ + _ + _ + _ =30

therefore, upto 4 blanks, the no. formed will be even.

even no. + _ = even no. (30 is even no.)

_ = even no.-even no.

_ = even no.

this is not possible since, we cannot fill blanks with even no.s

hence, we cannot fill all five blanks with odd no.s to get 30.