Contact us
Choose a category below so we can get back to you as quickly as possible.
오리지널 = [(1 + 2 + 3 +...+ 98 + 99 + 100) - 99 - 100] / 99 = 4851 / 99 = 49
We and our partners use cookies and other technologies to analyze traffic and optimize your experience. View more info and control your cookies settings at any time in our Cookies Policy.