Tim hai so le lien tiep a va b sao cho ;

                     1/a - 1/b = 2/99 [a be hon b ]

tu so cua mot phan so nho hon 1 la 3 chu so le lien tiep viet cac chu so cua tu so theo thu tu nguoc lai ta dduoc 1 phan so khi chia cho 9 dc 15/59 tim phan so do

a) viet so le nho nhat co 4 chu so biet so do lon hon 2000 va chia het cho 9

b) cho phan so 27/72 tim mot so tu nhien sao cho khi tu so cong voi so do va giu nguyen mau so thi duoc phan so moi bang 5/6

tim pan so co mau la 7 sao cho phan so do lon hon 2/3 va nho hon 5/6 tu so la....

2 lop 5A1 va 5A2 trong duoc so cay la 1 so vua chia het cho 2 ; 3 va 5 ma lon hon 150 nhung nho hon 200 . Biet so cay lop 5A1 trong duoc bang 2/3 so cay cua lop 5A2 . Tim so cay moi lop da trong duoc ?

giai chi tiet

tim mot so biet so do nho hon 800 va chu so hang tram nho hon chu so hang chuc , chu so hang chuc nho hon chu so hang don vi va tong cac so cua chu so cua so do bang 24

ba kho a b va c chua tat ca 1035 tan thoc biet so thoc o kho a nheu hon so thoc o kho b 93 tan nhung lai it hon tong so thoc o kho b va c la 517 tan vay kho c chua bao nhieu thoc  nho ban giai giup minh bai toan nay cam on ban

tong 3 so la 600 . tim so thu 3 , biet so thu 2 lon hon so thu 1 la 3 don vi nhung nho hon so thu 3 la 3 don vi 

tim so co 3 chu so biet chu so hang tram nho hon chu so hang chuc,chu so hang chuc nho hon chu so hang don vi va tong cac chu so do bang 6