Can you put the digits 1 to 11 in the circles so that every line has the same total?

Simple enough... the key is to put 6 in the middle.

Then you have to balance each line with one big number and one small. So for example...put 1 on the end of a line, 6 in the middle and 11 on the other side. Adds up to 18.

Then move around .... 2 and 10 with the 6 in the middle. 18 again.

3 and 9 (plus the 6) makes the same answer :)

make sense?