In the terms and conditions of a keysight promotion to win an oscilloscope, I stumbled over the following sentence:
In accordance with local laws, if the selected entrant is a Canadian or South African resident, that entrant will be required to answer a mathematical skill-testing question, without assistance of any kind (whether mechanical or otherwise), within the time frame provided above.
What is/are the law(s) behind this, and what is that law trying to achieve?