Question

[Do vu diep huong]

tim so tu nhien co 5 chu so biet rang neu viet them chu so 2 vao dang sau so do thi duoc so lon gap 3 lan so do co duoc bang cach viet them chu so 2 vao dang truoc so do

Answer 1

[Băng Dii~]

 Gọi số cần tìm là abcde 

 2abcde . 3 = abcde2

( 200000 + abcde ) . 3 = abcde . 10 + 2

600000 + abcde . 3 = abcde . 10 + 2

599998 = abcde . 7 

Answer 2

[Do vu diep huong]

To chang hieu cau tra loi ti gi luon e!

Cau tra loi lai di, minh dang rat la gap