For example, the string you could have the numbers 8, 1, 3 in a sequence since 8+1=9 (Nine is a square number) and 1+3=4 (Four is a square number).
Up Next Steps
1) What strategy did you deploy to tackle this problem?
2) Can you create a string of 1-16?
3) A string of 1-18 is impossible. How can you prove to someone that this is true?
4) Can you create a string of 1-23?
Check out the video below to see how others investigated this problem.