1. Tim tat ca cac so co 2 chu so sao cho moi so gap 2 lan tich cua no?

2. Tim so nguyen to co 3 chu so biet rang neu viet so do theo thu tu nguoc lai thi ta duc 1 so la lap phuong cua 1 so tu nhien?

3. Tim so tu nhien co 4 chu so biey chu so hang nghin bang chu so hang don vi chu so hang tram bang chu so hang chuc va so do viet duoc duoi dang tich cua 3 so nguyen to lien tiep?

tim so tu nhien co 2 chu so biet neu cong no voi so gom 2 chu so ay viet theo thu tu nguoc lai thi duoc so chinh phuong

cho 1 so chinh phuong co 4 chu so. Biet rang chu so tan cung cua no la so nguyen to, tong cac chu so cua no cung la so chinh phuong va can bac 2 cua no co tong cac chu so cung la so chinh phuong

1,TIM SO NGUYEN TO CO 3 CHU SO,BIET RANG NEU VIET SO DO THEO THU TU NGUOC LAI THI TA DUOC MOT SO LAP PHUONG CUA MOT SO TU NHIEN

tim so tn co 2 chu so biet hieu cac binh phuong cua so do va so viet boi 2 cs cua so do nhung theo hung nguoc lai la so chinh phuong

tim so co hai chu so biet :

so can tim cong voi so do nhung viet theo thu tu nguoc lai ta duoc mot so chinh phuong

tim so co 3 chu so sao cho hieu cua so ay va so gom 3 chu so ay viet theo chieu nguoc lai  la mot so chinh phuong

CO BAO NHIEU SO TU NHIEN CO 2 CHU SO SAO CHOSO DO CONG VOI SO DO DUOC VIET THEO THU TU NGUOC LAI CHO KET QUA LA 1 SO CHINH PHUONG

tim so nguyen to ab  co 2 chu so khac nhau sao cho ba cung la 1 so nguyen to va ab - ba la 1 so chinh phuong