Contact us
Choose a category below so we can get back to you as quickly as possible.
因為99=9×11,所以這個數必須同時整除11和9,根據一個數整除9,每個數位的和也是9的倍數的性質,則2+0+0+3=5,9-5=4,後兩位和為4或18-5=13,又因奇數位的和為:2+0=2,偶數比特的和為:0+3=3,所以如果後兩位和為4,…
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.