La so 4 va 10. Vi 4 va 10 la so chan con 1,7,13 la so le.
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Trong cac so duoi day so nao khong thuoc day so : 1,4,7,10, 13?
a/ 2007
b/ 1000
c/1234
d/100
cho day so sau 1;7;13;19;25;... So nao trong cac so sau thuoc day so tren
cho day so:36,45,54
a) viet them 3 so hang thich hop vao day so tren
b) so hang thu 20 thuoc day so nao
c) so 3469 co thuoc day so tren khong?vi sao
giai chi tiet giup minh nhe
cho day so 1;8;15;.......;694;701.
a,tinh tong cua cac so trong day tren.
b,so thu 51 cua day so la so bao nhieu?
c,so 1240 co thuoc day so tren khong?vi sao?
cac ban giai ca bai giup minh nhe,cam on nhieu...
Cho day so:2,4,6,8,10,....... Hoi:
a So hang thu 20 la so nao ?
b So 93 co thuoc day so tren khong ? Vi sao?
moi nguoi giup em voi nhe !
cho hai day so :
1 , 4, 7 , 10 , 13 , ....
1/2 , 2/3 , 3/5 , 5/8 , 8/13 ,.....
a, hay neu quy luat va viet hai so hang tiep theo cua moi day so tren .
b, so 2005 co phai la so hang cua day so 1,4,7,10,13 ... khong ? vi sao ?
cho day so 1004,1010 1016,....,2012.hoi so 2018va 1760 co thuoc day so tren khong
phong hop A co 12 day ghe , moi day ghe co 11 nguoi ngoi . phong hop B co 14 day ghe ,moi day ghe co 9 nguoi ngoi . trong cac cau duoi day , cau nao dung , cau nao sai ? a , phong hop A co nhieu hon phong hop B 9 nguoi . b, phong hop A co nhieu hon phong hop B 6 nguoi . c , phong hop A co it hon phong hop B 6nguoi . d , hai phong hop co so nguoi nhu nhau .
Cho day so : 45;54;63;....
a/ So hang thu 214 cua day tren la so nao ?
b/ So 2016 co thuoc day so tren ko? vi sao?