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## Answers

?+?+?+?+? = 30

hence, upto 4 blanks the sum formed will be even.

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

? = even no. - even no.

hence, one even no. is required.to fill the blanks

but we require all the odd no.s

hence question is incorrect

__The blanks couldn't be filled because the sum of odd numbers is never an even number!It could only be possible when the numbers are repeated.For eg- 1=1=2,3+3=6 etc.__