100a+10b+c=10a+b+10b+a+10b+c+10c+b+10c+a+10a+c
=>100a+10b+c=22a+22b+22c
=>78a=12b+21c
=>26a=4b+7c
100a+10b+c=10a+b+10b+a+10b+c+10c+b+10c+a+10a+c
=>100a+10b+c=22a+22b+22c
=>78a=12b+21c
=>26a=4b+7c
viet tat ca cac so thap phan co ba chu so khac nhau la 1,2 va 3 ( khong xet so tu nhien )
cho biet cach lam ngay bay gio
cho 3 chu so khac nhau va khac 0 co the lap duoc bao nhieu so khac nhau tu ba chu so do biet tong chieu cac so do la 3330 hieu so lon nhat va be nhat la 549 tim 3 chu so do
tim so tu nhien lon nhat co 3 CS khac nhau biet so do bang tong tat ca cac so co 2CS khac nhau lap duoc tu ba CS cua so do
tim so tu nhien lon nhat co3 chu so khac nhau biet rang so do bang tong tat ca cac so co hai chu so khac nhau duoc lap tu ba chu so cua so do
cho 2 phan so 6/7 va 2/9 hay tim p/s a/b sao cho khi them ab/ vao 2 p/s da cho thi ty so cua 2 p/s la 3
cho 2 phan so 6/7 va 1/9 hay tim p/s a/b sao cho khi them a/b vao 1/9 va bot a/b o 6/7 thi ta duoc 2 p/s co ty so la 3
viet duoc bao nhieu p/s ma tong cua tu so va mau so 2012 co bao nhieu p/s nho hon 1 bang 1 lon hon 1
tim hai so chan co tong la 2100 biet giua chung co 18 so chan khac tim 2 so tu nhien biet tong cua hai so nay la 2019 giua chung co tat ca 20 so tu nhien khac
ai nhanh minh tick 5 lan giai han bai giai ra nha
tim 1 so tu nhien khac 0 biet rang so do dem chia cho 5 thi du 4,chia 8 thi cung du 4 va hieu cua cac so do la 426
so tu nhien do la
Tong 2 so tu nhien la 2014. Tim 2 so biet giua chung co 99 so tu nhien khac
so tu nhien be nhat co 3 chu so khac nhau biet tong cac chu so la 22 la so nao?
Có the viet duoc bao nhieu so co ba chu so khac nhau, biet rang:
a, Cac chu so cua chung deu la nhung so le
b. cac chu so cua chung deu la so chan