My question was a triangle that showed 11 14 and 17. Between 11 was a gap of two numbers that had to equal 11, 17 and 14. There was also so a gap between 11 and 14. The way I worked it out was to test all posabilties I tried lots of sums but they did not work. Then I tried 5+6 for 11 and it worked. Then I did 6+9 for 17 then 5+9 for 14 and i worked. So after all that I double checked and it worked!!!!!!! Thank you.