Question

[danglethanh]

co 11 cai banh , hay tim cach chia so banh do cho 12 nguoi sao cho khong co cai banh nao cat thanh 12 phan

Answer 1

[Mai Nhật Linh]

Dễ mà:Chia 1 cai bánh ra lamf đôi

Answer 2

[danglethanh]

sai roi phai lam the nay 

11 cai banh chia cho 12 nguoi tuc moi nguoi duoc 11 : 12 = 11/12 ( cai banh )

 cach chia banh nhu sau :

-Chia 2 cai banh ma moi cai chia thanh 6 phan bang nhau => khi do moi nguoi 1/6 cai banh.

-Chia 3 cai banh ma moi cai chia thanh 4 phan bang nhau => khi do moi nguoi 1/4 cai banh.

-Chia 6 cai banh ma moi cai chia thanh 2 phan bang nhau => khi do moi nguoi 1/2 cai banh.

=> Moi nguoi lay : 1/6 + 1/4 + 1/2 = 2/12 + 3/12 + 6/12 = 11/12.