



 
Hi Laxmi, I created 10 spots in a line, each to hold one of the 10 digits. The sum of any adjacent digits is to be small so I want the large digits to be spaced far apart. Hence I started with the 9 and the 8 in the two extreme locations. The next largest digit is 7 and I don't want it in any of the 3 positions adjacent to 9 or 8. I put it here. See if you can now place the 7 remaining digits. For part b) if you have the nine digits 1 to 9 what is the sum of these digits? Penny  


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