Tim so nguyen to <200, biet rang khi chia no cho 60 thi so du la hop so

Tim cac Chu so a,b Sao cho lay so aaaa chia so bbb thi duoc Thuong la 17 du r . New lay 3 cs a chia 2 cs b duoc Thuong 17 Nhung so du Nho hon r  la 200

1 so nguyen to p chia cho 42 co so du r la hop so. Tim so du r

bai 3 cho p la so nguyen to lon hon 3 

A, chung to p co dang 6k+1 hoac 6k+5

B, cho p va 8p-1 la so nguyen to. chung to 8p+1 la hop so

bai 4 

A, tim a va b biet rang a.b=320 va BCNN(a,b)=160

B, tim so tu nhien a nho nhat co 3 chu so sao cho khi chia a cho 11 du 5 va chia cho 13 thi du 8

Mot so nguyen to p chia cho 42 du r la hop so . Tinh hop so r 

1)chung to rang so nguyen to p;p>5 khi chia cho 6 chi co the du 1 hoac 5

2)chung minh rang neu p va p+2 la so nguyen to lon hon 3 thi p+1 la mot hop so

cac an giai giup minh minh dang can gap

ai giai nhanh minh tick cho

chung to rang so nguyen to p;p>5 khi chia cho 6 co the du 1 hoac 5

2)chung minh rang neu p va p+2 la so nguyen to lon hon 3 thi p+1 la mot hop so

cho p la phan so nguyen to lon hon 3

a) tim so du khi p binh phuong cho 3

b) hoi p binh phuong +2015 la so nguyen to hay hop so

1.Tren nua mp bo chua tia Ox,ve cac tia Ox1,Ox2,Ox3,...,OxN sao cho:

xOx2=2xOx1,xOx3=3xOx1,.......,xOxN=NxOx1.tim so N nho nhat de trong cac tia da ve co mot tia la tia phan giac chung cua 2017 goc

2.CMR:neu p la so nguyen to lon hon 3 va 2p+1 cung la so nguyen to thi 4p+1 la hop so

3.So sanh: 63^15 va 34^18

4.tim cac so tu nhien n co hai chu so biet:2n+1 va 3n+1 deu la so chinh phuong

5.CMR: S=16^5+2^15 chia het cho 33