I didn't see that the check for the multiplication symbol was commented out for this test suite until I checked your solution...
Sorry about that. I added a statement that that function restriction is lifted in the problem description. Still, I'm impressed that you were able to solve it without using that function.
No worries. Multiplication without the * symbol is easy enough. There's a reason the final variable in my first solution is named "cheat" though; I had no idea how to accomplish the final check otherwise.
Well, I'll take that as a compliment, then, because your problems are clever and often stump me.
Project Euler: Problem 10, Sum of Primes
Bottles of beer
Sum of first n positive integers
Swap two numbers
Draw a 'N'!
Rule of mixtures (composites) - lower and upper bounds
Pattern Recognition 2 - Known Unit Length, Various Array Length (including cell arrays)
Divisible by n, prime divisors (including powers)
Lights Out 10 - 5x5, with wrapping, 6 moves
Tic-Tac-Logic - Solution Checker
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