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?
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:5,21,53,101,165.....
A.So 23765 la so hang thu may cua day ?
B.So hang thu 87cua day la so nao ?
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 day so 1,2,3,4,5,6,...1991,1992,day so tren co bao nhieu so hang tinh tong cua cac so hang do
cho day so 10,15,20,25,...hoi so 2015 la so hang thu bao nhieu cua day?
cho day so 10, 15 ,20 ,25 ... , hoi so hang 2015 la so hang bao nhieu trong day
ch day cac chu so tu nhien lien tiep tu 145 den 245.Hoi day so tren co bao nhieu chu so hang tram la 2?
Cho day cac so 1,4,7,...,88.Day so tren co tat ca bao nhieu so hang ?
