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tim so co 2 chu so biet 3 lan so do bang binh phuong 1 tong cac chu so cua so do va bang 4 lan tong cac chu so do
tim 1 so co 2 chu so . biet so do la lap phuong cua so tu nhien va tong cac chu so cua no bang binh phuong cua mot so tu nhien
tim 1 so co 3 chu so biet so do gap 39 lan tong cac chu so cua no
1 :nguoi ta viet lien nhauday so tu nhien bat dau la 1: 1 ,2, 3, 4 ,5 , hoi chu so chu 659 la chu so nao ? 2 : tim so co 3 chu so , biet rang chu so hang tram gap 4 lan chu so hang don vi va neu viet so ay theo thu tu nguoc lai thi no giam di 594 don vi.3 ; tim 2 so biet rang tong cua chung gap 5 lan hieu cua chung , tich cua chung gap 24 lan hieu cua chung4 : tim hai so biet rang tong cua chung gap 7 lan hieu cua chung con tich cua chung gap 192 lan hieu cua chung. giai theo phu...
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1 :nguoi ta viet lien nhauday so tu nhien bat dau la 1: 1 ,2, 3, 4 ,5 , hoi chu so chu 659 la chu so nao ?
2 : tim so co 3 chu so , biet rang chu so hang tram gap 4 lan chu so hang don vi va neu viet so ay theo thu tu nguoc lai thi no giam di 594 don vi.
3 ; tim 2 so biet rang tong cua chung gap 5 lan hieu cua chung , tich cua chung gap 24 lan hieu cua chung
4 : tim hai so biet rang tong cua chung gap 7 lan hieu cua chung con tich cua chung gap 192 lan hieu cua chung.
giai theo phuong phap lop 6 nhe
tim so tu nhien co hai chu so thoa man ba dieu kien sau.tong cac chu so cua no khong nho hon 7 tong binh phuong cac chu so khong lon hon 30.hai lan so duoc viet boi cac chu so cua so phai tim theo thu tu nguoc lai khong lon hon so do
tim 1 so tu nhien co 3 chu so,biet so do gáp 20 lan tong cac chu so cua no
tim so tu nhien co 3 chu so ,biet rang so do gap 20 lan tong cac chu so cua no
Cho a la so co 2 chu so tim a biet rang tong 2 chu so cua a cong them binh phuong cua tong 2 chu so do se duoc a.
1.tim 2 so tu nhien co hieu bang 2002 va tich bang 2006.
2.cho 100 so tu nhien 1,2,3,4,....100.
co the chon duoc 71 so tu nhien sao cho tong cua chung bang tong cua 29 so con lai khong
3.mot so chan co 4 chu so , trong do so tao boi chu so hang tram va hang chuc gap 3 lan chu so hang nghin va gap 2 lan chu so hang don vi .
[CAC BAN GHI LOI GIAI GIUP MINH NHE MINH CAM ON]