Cho day so tu nhien lien tiep 1;2;3;4;5;6;....n
tim n bietso chu so cua day do bang 2 lan n
neu ai khong biet violympic vong 16 la day
cau 1:me hon con 30 tuoi neu cong them vao tuoi me so tuoi cua con thi duoc mot so bang 5/4 so tuoi me :tuoi me la 40 tuoi ,con 10 tuoi
cau 2:3/4 cua 20 m la: 15 m
cau 3:5/6 cua 24 kg la :20 kg
cau 4:neu 5/6 cua q kg la 105 kg thi q la :126
cau 5:neu 3/4 cua t la 186 thi t la :248
cau 6:mot hinh chu nhat co chu vi bang 3 lan chieu dai biet chieu rong bang 20m tinh chieu dai hinh chu nhat : chieu dai hinh chu nhat la 40 m
cau 7:1 chiec thuyen cho 36 thung hang .moi thung hang nang 5/9 ta .hoi chiec thuyen cho bao nhieu tan hang :2 tan
cau 8:8*(28 +22)+(138+362):5=500
cau 9:435 +24:y=500-65+24:3:vay y =3
cau 10: tim so co 4 chu so 1c20 lon nhat chia het cho ca 2;3 va 5 :so do la 1920
chuc cac ban thi tot
tim so co 2 chu so biet rang neu viet xen chu so 0 vao giua 2 chu so cua so do thi ta duoc so do bang 7 lan so phai tim
1/ Quynh hoi ba:"ba oi ba bao nhieu tuoi a'' .Ba dap :tuoi cua ba co hai chu so mot chu so bang tuoi cua Thu va 1 chu so bang tuoi cac em ho cua chau day .
Quynh thac mac hoi ba :''nhung chau co biet cac em ay bao nhieu tuoi dau?''. Ba tra loi ''neu cong tuoi cua tThu va Nam voi ba thi tron 83''.Tinh tuoi ba.
2/ Hien nay trung binh cong cua hai anh em la 14 tuoi . Hai nam truoc tuoi em bang 3/5 tuoi anh .Hoi hien nay em bao nhieu tuoi.
3/ Tuoi cha gap 4 lan tuoi con . Sau 20 nam nua tuoi cha gap 2 lan tuoi con . Tinh tuoi moi nguoi hien nay.
giai nhanh giup minh nhe
biet bai nao giai ho bai y
1tim mot so co 2 chu so biet rang so do gap 5 lan tong chu cac so cua no
tim so co 3 chu chu so biet rang them chu so 5 vao ben phai so do thi so do tang them 1112dv
tim mot so tu nhien co 2 chu so biet rang them chu so 9 vao ben trai so do thi duoc mot so gap 13 lan so da cho
Tim hai so co 2 chu so biet tong hai chu so cua so do bang 9 va hieu cua hai so do bang 3
Tim 2 so co hiểu bang 516 biet rang nếu lay so lon chia cho so be thi duoc thuong bang 4.
Tim hai so biet ti so cua chung bang 4/7 va nếu lay so lon tru đi so be thi duoc ket qua bang 360.
Ca 3 nguoi tho lam cong duoc 270000 dong. Nguoi thu nhat duoc 1/3 so Tiền. Nguoi thu ba duoc 2/5 so tien. Tinh tien nguoi thu ba.
Cho 4 chu so 0,3,8,9. Viet duoc bao nhieu so tu nhiên co 4 chu so khác nhau tu 4 chu so da cho.
Lop 5A co 1/2 so hoc sinh nữ bang 1/5 so hoc sinh nam. Biet so hoc sinh nữ kem so hoc sinh nam la 15 ban . Tinh hoc sinh nam va hoc sinh nữ.
cho so co 2 chu so ma so lon bang 3 lan so be. neu dem so be viet them vao ben phai va ben trai so lon ta duoc hai so moi moi so 4 co 4 chu so. tong cua 2 so co 4 chu so do bang 4848. tim 2 so da cho
1.tim 1 so biet neu viet them vao ben phai so do co 1 chu so 6 thi ta duoc 1 so moi hon so da cho la 888 don vi
2.cho 1 so co 2 chu so biet neu viet them 1 chu so n vao ca dang truoc va dang sau so do thi ta duoc 1 so moi co 4 chu so . So moi gap 21 lan so da cho . Tim so da cho va so n viet them