Problem:
There are three ways to add four odd numbers and get 10:
Changes in the order of numbers do not count as new solutions.
Now add eight odd numbers to get 20. To find all eleven solutions, you will need to be systematic.
-Nalin Pithwa
PS: I found this gem in a Russian book (translated).
2 Comments
1+1+1+1+1+1+1+13=20
1+1+1+1+1+1+3+11=20
1+1+1+1+1+1+5+9=20
1+1+1+1+1+1+7+7=20
1+1+1+1+1+3+3+9=20
1+1+1+1+1+3+5+7=20
1+1+1+1+1+5+5+5=20
1+1+1+1+3+3+3+7=20
1+1+1+1+3+3+5+5=20
1+1+1+3+3+3+3+5=20
1+1+3+3+3+3+3+3=20
vv good ! Keep it up !!