Tim 4 so nguyen to lien tiep sao cho tong cua 4 so nguyen to do cung la 1 so nguyen to
Tim 3 so nguyen co tong bang -4, biet rang so thu nhat nhan 2, so thu hai cong voi 3, so thu ba tru di 4 thi duoc cac ket qua bang nhau. Tim 3 so do?
AI LAM DAU TIEN, CO TRINH BAY, DAP AN DUNG, MINH SE TICK CHO 1O CAI
Tim 3 so nguyen co tong bang -4, biet rang so thu nhat nhan 2, so thu hai cong voi 3, so thu 3 tru di 4 thi duoc cac ket qua bang nhau. Tim ba so do?
AI TRA LOI DUNG SE DUOC TICK 10 CAI
a) tim 2 so nguyen to co tong bang 999
b)tim 3 so nguyen to co tong bang 84
Cho 31 so nguyen trong do co 5 so bat ki co tong la so nguyen duong.Hay chung to rang tong cua 31 so do deu la so nguyen duong
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 nguyen to biet rang so do bang tong 2 so nguyen to va bang hieu 2 so nguyen to
Cho hai so nguyen to cung nhau la a,b .
CMR hai so 11a+2b va 18a+5b thi hoac nguyen to cung nhau hoac co mot uoc chung la 19.
CMR: 2 so le lien tiep nguyen to cung nhau.