Solve for y:
230 - 220 * 0.5 = y
You won't believe it,
but the answer is 5!
The answer is 5!.
5! = 5 * 4 * 3 * 2 * 1 = 120
sorry, but this riddle is not correct...
In the first you write that the solution would be 5. You don´t write that it would be 5!.
At the end of the sentence must be a point or exclamation mark. The mathematical symbol exclamation mark is not yet correct as the end of the sentence. Only in your hint the solution is correct.