So nguyen to la so gi vay
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biết ba số a,b,c la ba so nguyen to le lien tiep , so cac so duoc lap tu ba so a,b,c la
biet a,b,cla 3 thua so nguyen to lien tiep nhau . so cac so lap duoc tu 3 chu so a,b,c la
So chan la so tu nhien co chu so tan cung la 0;2;4;6;8 ; so le la so tu nhien co chu so tan cung la 1;3;5;7;9;.Hai so chan ( hoac so le ) thi
hon kem nhau 2 don vi a)viet tap C cac chang nho hon 10.b) viet tap hop L cac so le lon hon 10 nhung nho hon 20.c)viet tap hop A ba chu so chan lien tiep trong do so nho nhat la 18.d)viet tap hop B bon so le lien tiep, trong do so lon nhat la 31
Cau Dung Sai
a) co hai so tu nhien lien tiep deu la so nguyen to
b) Co ba so le lien tiep dau la so nguyen to
c)Moi so nguyen tao deu la so le
d)moi so nguyen to deu co chu so tan cung la mot trong ?
CauDungSaiCo hai so tu nhien lien tiep deu la so nguyen to Co ba so le lien tiep deu la so nguyen to Moi so nguyen to deu la so le Moi so nguyen to deu co chu so tan cung la mot trong cac chu so 1,3,7,9 Ai tra loi nhanh nhat thi minh se like 3 lan Co gang len nha !
Đọc tiếp
| Cau | Dung | Sai |
| Co hai so tu nhien lien tiep deu la so nguyen to | ||
| Co ba so le lien tiep deu la so nguyen to | ||
| Moi so nguyen to deu la so le | ||
| Moi so nguyen to deu co chu so tan cung la mot trong cac chu so 1,3,7,9 | ||
Ai tra loi nhanh nhat thi minh se like 3 lan | ||
| Co gang len nha ! |
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?
goi A la tich cac so nguyen lien tiep tu 1 den 1001 va B la tich cac so nguyen lien tiep tu 1006 den 2017 . hoi A+B co chia het cho 2017 ko?
cac ban ghi ca loi giai gia nhe . ai nhanh nhat minh se tick cho
a - b + 2015; b-c +2015; c - a +2015 la 3 so nguyen lien tiep (voi a, b, c la cac so nguyen). hoi do la 3 so nao
1.Tong (hieu) sau la so nguyen to hay hop soa/5.6.7+8.9 b/5.7.9.11-2.3.7 c/5.7.11+13.17.19 d/4253+14222.Hai so nguyen to sinh doi la hai so nguyen to hon kem nhau 2 don vi.Tim hai si nguyen to sinh doi nho hon 50.3.Cho biet:Neu do tu nhien a(lon hon 1)khong chia het cho moi so nguyen to p ma binh phuong ko vuot qua a(tuc la p2 lon hon hoac bang aĐ thi a la so nguyen to.Dung nhan xet tren cho biet so nao trong...
Đọc tiếp
1.Tong (hieu) sau la so nguyen to hay hop so
a/5.6.7+8.9 b/5.7.9.11-2.3.7 c/5.7.11+13.17.19 d/4253+1422
2.Hai so nguyen to sinh doi la hai so nguyen to hon kem nhau 2 don vi.Tim hai si nguyen to sinh doi nho hon 50.
3.Cho biet:Neu do tu nhien a(lon hon 1)khong chia het cho moi so nguyen to p ma binh phuong ko vuot qua a(tuc la p2 lon hon hoac bang aĐ thi a la so nguyen to.Dung nhan xet tren cho biet so nao trong cac so 59;121;179;197;217 la so nguyen to?
4.a/So 2009 co la boi cua 41 ko?
b/Tu 2000 den 2020 chi co 3 so nguyen to la 2003;2011;2017.Hay giai thich tai sao cac so le khac trong khoang tu 2000 den 2020 deu la hop so.
5.Goi a=2 . 3 . 4 . 5 . .... . 101. Co phai 100 so tu nhien lien tiep sau deu la hop so ko?
a+2,a+3,a+4,...,a+101.
ai dung kik cho,giup mk nha,ai biet lam bai nao thi lam cung dc,lm het cang tot