haha tao là người dả mạo thằng Kỷ Băng Hà đây! Nếu đứa nào ghét thằng chó đó thì nhớ li-ke cho tao với! Đứa nào ghét nó vì nó chuyên copy bài thì kết bạn rồi nhắn tin với tao. haaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
haha tao là người dả mạo thằng Kỷ Băng Hà đây! Nếu đứa nào ghét thằng chó đó thì nhớ li-ke cho tao với! Đứa nào ghét nó vì nó chuyên copy bài thì kết bạn rồi nhắn tin với tao. haaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
haha tao là người dả mạo thằng Kỷ Băng Hà đây! Nếu đứa nào ghét thằng chó đó thì nhớ li-ke cho tao với! Đứa nào ghét nó vì nó chuyên copy bài thì kết bạn rồi nhắn tin với tao. haaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
Tổng số nhà cuối và số nhà đầu :
4950 : 50 x 2 = 198
Vì là sô chăn liên tiếp hiệu số đầu và số cuối là :
(50 - 1) x 2 = 98
Số nhà đầu tiên là :
(198 - 98) : 2 = 50
Đ/S:50
Chúc bạn học tốt!