UPSC Maths Problems Challenge : A Problem A Day! (Day 6)

I solved a very similar problem to this over here. (Remember the post about the problem that could be solved by IAS Topper 2014 Gaurav Agarwal only?) This is almost the same problem but it has five blanks instead of three and let me also specify that the question has been asked under the tag 'tricky' and does not require conventional ways of Arithmetic to be solved.

I am still sure that many have solved this problem with five blanks as well but this is relatively something I have not seen on WhatsApp or Facebook and that is what makes it even more intriguing!

Here is how I have solved this problem.

(Original Photograph Source)

Today's Problem(18/06/2015)

Question Credit : http://www.m4maths.com

( ) + ( ) +( ) + ( ) + ( ) =30

fill in brackets using (1, 3, 5, 7, 9, 11, 13, 15 )

1 fortnight + 1 day + 3 days + 5 days + 7 days = 30 days

I found this even easier than the last one,probably because I already have had a prior experience on how to solve such tricky questions.Which problem was better I do not know but both were very interesting and tricky at the same time.The problem has been solely solved by me here.