Login ID is invalid?
– Check your spelling.
NOT case-sensitive. Either lowercase or uppercase is ok;
– Make sure no extra spaces added before or after;
– Confirm you’re on KooBits ProblemSums Login Page;
– Forgot your Login ID? You should Check Login ID Format for your school first;
– Your Login ID might have been changed this year, so please Check Login ID Format;
– Do you have a valid KooBits account this year?
If not sure, email email@example.com to enquire.