co bao nhieu so co 2 chu so ma tong no la 14
Co bao nhieu so co 4 chu so ma moi co tong cac chu so cua no la 3.
3 = 3 + 0 + 0 + 0 : 3000 -> có 1 số
3 = 2 + 1 + 0 + 0 : 1200, 1020, 1002, 2001, 2010, 2100. -> có 6 số.
3 = 1 + 1 + 1 + 0 : 1110, 1101, 1011 -> có 3 số.
Vậy có tất cả:
3 + 1 + 6 = 10 (số)
Đáp số: 10 số
co bao nhieu so co 4 chu so ma tong cac chu so cua no deu la 4
co tat ca bao nhieu so tu nhien co 2 chu so ma so do bang 7 la tong cac chu so cua no
hay cho biet co tat ca bao nhieu so co 3 chu so ma tong moi chu so cua no la 4
co bao nhieu STN co 5 chu so ma tong cac chu so cua no la 3
hay cho biet co tat ca bao nhieu so co 2 chu so ma neu lay moi so do chia cho tong cac chu so cua no duoc thuong la 4 du 3
hieu cua hai so la so lon nhat co 2 chu so ma tong 2 chu so cua no bang 12 so tru bang 7 vay so bi tru cua no la bao nhieu vay cac ban
hieu cua hai so la so lon nhat co 2 chu so ma tong 2 chu so cua no bang 12 so tru bang 7 vay so bi tru cua no la 86
Tong 2 chu so bang 12. Ta co 9 + 3 = 12
Hieu cua 2 so la so lon nhat co 2 chu so la: 93
Cong thuc: SBT - ST= Hieu , mà ST=7
Vay ta co: 100 - 7 = 93
Dap so: SBT la: 100
co bao nhieu so co sau chu so ma tong cac chu so cua no bang 2 ?
100001;100010;100100;101000;110000; 200000
6 số nha bn !
~HT~
100001;100010;100100;101000;110000;200000
co bao nhieu so co 2 chu so ma tong cac so la 15 ?