Tim tat ca bo ba so nguyen (a,b,c) thoa man

a^3(b-c)+b^3(c-a) + c^3(a-b)=1964^2013

TIM MOT SO CO BA CHU SO BIET RANG KHI BO DI CHU SO HANG TRAM THI DUOC MOT SO MOI BANG 1/7 SO CO BA CHU SO DA CHO BAN DAU

 

a, Chung minh rang 5m+3 va 3m+2 la 2 so nguyen biet rang 1 so bang 10 ngen to cung nhau voi m la so nguyen to bat ky.

b,Tim 1 bo ba so nguyen to biet rang 1 so bang 10 phan tram tong cua 3 so can tim

Ai lam nhanh nhat minh tick cho

tim so co ba chu so  , co chu so hang tram la 2  va neu xoa bo chu so hang tram thi so do giam di 6 lan

 

Cho 1 so co ba chu so . Gach bo chu so hang tram ta duoc so co 2 chu so ma nhan so nay voi 7 ta duoc so co 3 chu so da cho . Tim so do

tim mot so thap phan a , co 2 chu so thap phan  biet rang neu them dau phay sang trai mot hang ta duoc so b neu bo dau phap ta duoc so tu nhien c ba so co tong la 1247.574

giup minh voi

tuoi Dung gap 5 lan tuoi em gai Dung . Tuoi me Dung gap 6 lan tuoi Dung .Tuoi bo Dung bang so tuoi cua 3 me con cong lai . Tuoi ba Dung bang tuoi cua bo , me , 2 anh em Dung cong lai . Hay tim so tuoi cua Dung , biet tuoi cua ba Dung chua den 100 tuoi .

 

tim hai so co hieu bang hai tram muoi sau biet rang neu them mot chu so khong vao ben phai so be thi duoc so lonhieu cua hai so bang ba tram chin muoi ba biet rang neu xoa chu so cuoi cua so lon thi duoc so behien nay bo ba mot tuoi con bon tuoi .Hoi bao nhieu nam nua tuoi bo gap bon lan tuoi con

giai nhanh giup minh nhe minh can rat rat gap

cho mot so co ba chu so ma chu so hang tram la 4.neu xoa bo chu so 4 nay di,ta duoc mot so co hai chu so.biet tong cua so co ba chu soda cho vaso co hai chu soco duoc sau khi xoa chu so 4la 450.tim so co ba chu so da cho ban dau.