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{"segment":[{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[4]],"list":[{"point":10,"ques":"Cho 5 s\u1ed1 t\u1ef1 nhi\u00ean 1; 0; 3; 4; 9. <br\/>C\u00f3 th\u1ec3 l\u1eadp \u0111\u01b0\u1ee3c bao nhi\u00eau s\u1ed1 t\u1ef1 nhi\u00ean c\u00f3 2 ch\u1eef s\u1ed1 kh\u00e1c nhau t\u1eeb c\u00e1c s\u1ed1 tr\u00ean?","select":["A. 10 s\u1ed1 ","B. 12 s\u1ed1 ","C. 15 s\u1ed1 ","D. 16 s\u1ed1 "],"hint":"M\u1ed7i s\u1ed1 gh\u00e9p \u0111\u00f4i v\u1edbi 1 s\u1ed1 c\u00f2n l\u1ea1i \u0111\u01b0\u1ee3c 2 s\u1ed1 c\u00f3 2 ch\u1eef s\u1ed1, ri\u00eang s\u1ed1 0 gh\u00e9p \u0111\u00f4i v\u1edbi 1 s\u1ed1 c\u00f2n l\u1ea1i th\u00ec \u0111\u01b0\u1ee3c 1 s\u1ed1 c\u00f3 2 ch\u1eef s\u1ed1","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn: <\/span> <br\/> L\u1ea5y c\u00e1c s\u1ed1 1; 3; 4; 9 l\u00e0m ch\u1eef s\u1ed1 h\u00e0ng ch\u1ee5c v\u00e0 vi\u1ebft c\u00e1c ch\u1eef s\u1ed1 h\u00e0ng \u0111\u01a1n v\u1ecb t\u01b0\u01a1ng \u1ee9ng t\u1eeb c\u00e1c s\u1ed1 \u0111\u00e3 cho<br\/> <br\/><\/span><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span> <br\/> <br\/> Ch\u1ecdn l\u1ea7n l\u01b0\u1ee3t c\u00e1c s\u1ed1 1; 3; 4; 9 l\u00e0m ch\u1eef s\u1ed1 h\u00e0ng ch\u1ee5c <br\/>Ta c\u00f3 h\u00ecnh v\u1ebd: <center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/daiso/bai2/lv3/img\/D612_K101.png' <br\/><\/center><br\/> Nh\u00ecn v\u00e0o h\u00ecnh v\u1ebd ta th\u1ea5y c\u00f3 th\u1ec3 vi\u1ebft \u0111\u01b0\u1ee3c 16 s\u1ed1 c\u00f3 hai ch\u1eef s\u1ed1 kh\u00e1c nhau t\u1eeb c\u00e1c s\u1ed1 tr\u00ean <br\/><span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: D<\/span>","column":2}]}],"id_ques":91},{"time":24,"part":[{"title":"\u0110i\u1ec1n s\u1ed1 th\u00edch h\u1ee3p v\u00e0o ch\u1ed7 tr\u1ed1ng","title_trans":"","temp":"fill_the_blank","correct":[[["192"]]],"list":[{"point":10,"width":40,"type_input":"","ques":"Vi\u1ebft c\u00e1c s\u1ed1 t\u1ef1 nhi\u00ean t\u1eeb 1 \u0111\u1ebfn 100 k\u1ebf ti\u1ebfp nhau t\u1eeb tr\u00e1i qua ph\u1ea3i th\u00e0nh d\u00e3y 1234567891011...99100 <br\/> D\u00e3y s\u1ed1 tr\u00ean c\u00f3: _input_ ch\u1eef s\u1ed1","hint":"T\u00ednh s\u1ed1 ch\u1eef s\u1ed1 c\u1ee7a c\u00e1c s\u1ed1 c\u00f3 1 ch\u1eef s\u1ed1, c\u00e1c s\u1ed1 c\u00f3 2 ch\u1eef s\u1ed1 v\u00e0 c\u00f3 3 ch\u1eef s\u1ed1 sau \u0111\u00f3 c\u1ed9ng l\u1ea1i","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> <b> B\u01b0\u1edbc 1:<\/b> T\u00ednh s\u1ed1 ch\u1eef s\u1ed1 c\u1ee7a c\u00e1c s\u1ed1 t\u1eeb 1 \u0111\u1ebfn 9? <br\/> <b> B\u01b0\u1edbc 2: <\/b> T\u00ednh s\u1ed1 ch\u1eef s\u1ed1 c\u1ee7a c\u00e1c s\u1ed1 t\u1eeb 10 \u0111\u1ebfn 99<br\/> <b>B\u01b0\u1edbc 3: <\/b>T\u00ednh s\u1ed1 ch\u1eef s\u1ed1 c\u1ee7a s\u1ed1 100<br\/> <b> B\u01b0\u1edbc 4: <\/b> T\u00ednh s\u1ed1 ch\u1eef s\u1ed1 c\u1ee7a d\u00e3y 123456...99100<br\/> <\/span> <br\/><br\/><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> <br\/> T\u1eeb 1 \u0111\u1ebfn 9 c\u00f3: 9 ch\u1eef s\u1ed1 <br\/> T\u1eeb 10 \u0111\u1ebfn 99 c\u00f3: [(99 - 10) + 1] . 2 = 180 ch\u1eef s\u1ed1 <br\/> S\u1ed1 100 c\u00f3 3 ch\u1eef s\u1ed1 <br\/> V\u1eady d\u00e3y 1234567891011...99100 c\u00f3: <br\/> 9 + 180 + 3 = 192 ch\u1eef s\u1ed1 <br\/><span class='basic_pink'> V\u1eady s\u1ed1 c\u1ea7n \u0111i\u1ec1n l\u00e0: 192<\/span>"}]}],"id_ques":92},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":10,"ques":"S\u1ed1 75 trong h\u1ec7 La M\u00e3 vi\u1ebft l\u00e0: ","select":["A. LXV ","B. CXV ","C. LXXV ","D. CXXV"],"hint":"Trong h\u1ec7 La M\u00e3 L l\u00e0 50, X l\u00e0 10, V l\u00e0 5","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn: <\/span> <br\/>V\u00ec trong h\u1ec7 La M\u00e3 kh\u00f4ng c\u00f3 s\u1ed1 70 n\u00ean 75 \u0111\u01b0\u1ee3c t\u00e1ch ra th\u00e0nh 50, 10, 10 v\u00e0 5 <br\/> Vi\u1ebft c\u00e1c s\u1ed1 La M\u00e3 t\u01b0\u01a1ng \u1ee9ng r\u1ed3i gh\u00e9p l\u1ea1i \u0111\u1ec3 \u0111\u01b0\u1ee3c s\u1ed1 75<br\/> <br\/><\/span><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span> <br\/> <br\/>V\u00ec trong h\u1ec7 La M\u00e3 kh\u00f4ng c\u00f3 s\u1ed1 70 n\u00ean 75 \u0111\u01b0\u1ee3c t\u00e1ch ra th\u00e0nh 50, 10, 10 v\u00e0 5 <br\/> V\u1eady trong h\u1ec7 La M\u00e3 75 \u0111\u01b0\u1ee3c vi\u1ebft l\u00e0: LXXV<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: C<\/span><br\/> L\u01b0u \u00fd: \u0110\u1ec3 vi\u1ebft s\u1ed1 t\u1ef1 nhi\u00ean trong h\u1ec7 La M\u00e3 tr\u01b0\u1edbc h\u1ebft ta c\u1ea7n vi\u1ebft s\u1ed1 \u0111\u00f3 d\u01b0\u1edbi d\u1ea1ng t\u1ed5ng c\u1ee7a c\u00e1c s\u1ed1, m\u1ed7i s\u1ed1 c\u00f3 gi\u00e1 tr\u1ecb b\u1eb1ng 1 ch\u1eef s\u1ed1 La M\u00e3. Sau \u0111\u00f3 vi\u1ebft c\u00e1c ch\u1eef s\u1ed1 La M\u00e3 theo th\u1ee9 t\u1ef1 t\u1eeb l\u1edbn \u0111\u1ebfn nh\u1ecf","column":2}]}],"id_ques":93},{"time":24,"part":[{"title":"\u0110i\u1ec1n s\u1ed1 th\u00edch h\u1ee3p v\u00e0o ch\u1ed7 tr\u1ed1ng","title_trans":"","temp":"fill_the_blank_random","correct":[[["1007"],["1008"]]],"list":[{"point":10,"width":60,"content":"","type_input":"","ques":"H\u00e3y t\u00ecm hai s\u1ed1 t\u1ef1 nhi\u00ean li\u00ean ti\u1ebfp m\u00e0 t\u1ed5ng b\u1eb1ng 2015 <br\/> Hai s\u1ed1 \u0111\u00f3 l\u00e0: _input_; _input_ ","hint":"B\u00e0i to\u00e1n t\u00ecm hai s\u1ed1 bi\u1ebft t\u1ed5ng hi\u1ec7u","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> V\u00ec hai s\u1ed1 t\u1ef1 nhi\u00ean li\u00ean ti\u1ebfp h\u01a1n k\u00e9m nhau 1 \u0111\u01a1n v\u1ecb n\u00ean hi\u1ec7u l\u00e0 1 <br\/> G\u1ecdi s\u1ed1 b\u00e9 l\u00e0 a, s\u1ed1 l\u1edbn l\u00e0 a + 1 <br\/> V\u00ec t\u1ed5ng 2 s\u1ed1 b\u1eb1ng 2015 n\u00ean a + (a + 1) = 2015 ta t\u00ecm \u0111\u01b0\u1ee3c a <\/span> <br\/> <br\/> <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> G\u1ecdi s\u1ed1 b\u00e9 l\u00e0 a, s\u1ed1 l\u1edbn l\u00e0 a + 1 <br\/> Theo \u0111\u1ec1 b\u00e0i ta c\u00f3: <br\/>$\\begin{align*} a + \\left(a + 1\\right) &= 2015 \\\\ a + a &= 2014 \\\\ a &= 1007\\end{align*}$<br\/> V\u1eady hai s\u1ed1 c\u1ea7n t\u00ecm l\u00e0 1007 v\u00e0 1008 <br\/><span class='basic_pink'>C\u00e1c s\u1ed1 c\u1ea7n \u0111i\u1ec1n l\u00e0: 1007; 1008<\/span>"}]}],"id_ques":94},{"time":24,"part":[{"title":"\u0110i\u1ec1n s\u1ed1 th\u00edch h\u1ee3p v\u00e0o ch\u1ed7 tr\u1ed1ng","title_trans":"","temp":"fill_the_blank","correct":[[["94"]]],"list":[{"point":10,"width":70,"content":"","type_input":"","ques":"S\u1ed1 94132 c\u00f3 s\u1ed1 ngh\u00ecn l\u00e0: _input_ ","hint":"T\u00e1ch s\u1ed1 94132 theo c\u1ea5u t\u1ea1o s\u1ed1 \u0111\u1ec3 t\u00ecm s\u1ed1 ngh\u00ecn","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> T\u00e1ch s\u1ed1 94132 theo c\u1ea5u t\u1ea1o s\u1ed1 \u0111\u1ec3 t\u00ecm s\u1ed1 ngh\u00ecn <\/span> <br\/> <br\/> <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> $\\begin{align*}94132 &= 90 000 + 4 000 + 132 \\\\ &= 90 \\text{ngh\u00ecn} + 4 \\text{ngh\u00ecn} + 132 \\text{\u0111\u01a1n v\u1ecb} \\\\ &= 94 \\text{ngh\u00ecn} + 132 \\text{\u0111\u01a1n v\u1ecb} \\end{align*}$<br\/> <span class='basic_pink'>V\u1eady s\u1ed1 94132 c\u00f3 s\u1ed1 ngh\u00ecn l\u00e0: 94 <\/span>"}]}],"id_ques":95},{"time":24,"part":[{"title":"\u0110i\u1ec1n s\u1ed1 th\u00edch h\u1ee3p v\u00e0o ch\u1ed7 tr\u1ed1ng","title_trans":"","temp":"fill_the_blank","correct":[[["12354"]]],"list":[{"point":10,"width":70,"content":"","type_input":"","ques":"H\u00e3y vi\u1ebft th\u00eam ch\u1eef s\u1ed1 5 xen gi\u1eefa c\u00e1c ch\u1eef s\u1ed1 c\u1ee7a s\u1ed1 1234 \u0111\u1ec3 \u0111\u01b0\u1ee3c s\u1ed1 nh\u1ecf nh\u1ea5t c\u00f3 th\u1ec3. <br\/> S\u1ed1 vi\u1ebft \u0111\u01b0\u1ee3c l\u00e0: _input_ ","hint":"Vi\u1ebft th\u00eam ch\u1eef s\u1ed1 5 xen gi\u1eefa c\u00e1c ch\u1eef s\u1ed1 c\u1ee7a s\u1ed1 1234 sau \u0111\u00f3 t\u00ecm s\u1ed1 nh\u1ecf nh\u1ea5t","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> V\u00ec s\u1ed1 1234 c\u00f3 4 ch\u1eef s\u1ed1 <br\/> N\u00ean s\u1ed1 vi\u1ebft th\u00eam v\u00e0o c\u00f3 th\u1ec3 \u0111\u1ee9ng gi\u1eefa ch\u1eef s\u1ed1 h\u00e0ng ngh\u00ecn v\u00e0 h\u00e0ng tr\u0103m <br\/> Ho\u1eb7c xen gi\u1eefa ch\u1eef s\u1ed1 h\u00e0ng tr\u0103m v\u00e0 h\u00e0ng ch\u1ee5c <br\/> Ho\u1eb7c xen gi\u1eefa ch\u1eef s\u1ed1 h\u00e0ng ch\u1ee5c v\u00e0 h\u00e0ng \u0111\u01a1n v\u1ecb<br\/> Ch\u1ecdn s\u1ed1 nh\u1ecf nh\u1ea5t<\/span> <br\/> <br\/> <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> Ta c\u00f3 th\u1ebf vi\u1ebft th\u00eam ch\u1eef s\u1ed1 5 xen gi\u1eefa c\u00e1c ch\u1eef s\u1ed1 c\u1ee7a s\u1ed1 1254 \u0111\u1ec3 \u0111\u01b0\u1ee3c c\u00e1c s\u1ed1 sau: 15234; 12534; 12354<br\/> S\u1ed1 nh\u1ecf nh\u1ea5t l\u00e0: 12354 <br\/><span class='basic_pink'>V\u1eady s\u1ed1 c\u1ea7n \u0111i\u1ec1n l\u00e0: 12354<\/span>"}]}],"id_ques":96},{"time":24,"part":[{"title":"\u0110i\u1ec1n s\u1ed1 th\u00edch h\u1ee3p v\u00e0o ch\u1ed7 tr\u1ed1ng","title_trans":"","temp":"fill_the_blank_random","correct":[[["41"],["14"],["28"],["82"]]],"list":[{"point":10,"width":60,"content":"","type_input":"","ques":"H\u00e3y vi\u1ebft t\u1eadp h\u1ee3p A g\u1ed3m c\u00e1c s\u1ed1 c\u00f3 hai ch\u1eef s\u1ed1 m\u00e0 ch\u1eef s\u1ed1 h\u00e0ng ch\u1ee5c v\u00e0 ch\u1eef s\u1ed1 h\u00e0ng \u0111\u01a1n v\u1ecb g\u1ea5p k\u00e9m nhau 4 l\u1ea7n<br\/> V\u1eady A ={ _input_; _input_; _input_; _input_ }","hint":"Li\u1ec7t k\u00ea c\u00e1c c\u1eb7p s\u1ed1 g\u1ea5p k\u00e9m nhau 4 l\u1ea7n r\u1ed3i l\u1eadp c\u00e1c s\u1ed1 c\u00f3 hai ch\u1eef s\u1ed1 t\u1eeb c\u00e1c c\u1eb7p s\u1ed1 \u0111\u00f3","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> <b> B\u01b0\u1edbc 1: <\/b> Vi\u1ebft c\u00e1c c\u1eb7p s\u1ed1 g\u1ea5p k\u00e9m nhau 4 l\u1ea7n <br\/> <b> B\u01b0\u1edbc 2: <\/b>Vi\u1ebft c\u00e1c s\u1ed1 c\u00f3 hai ch\u1eef s\u1ed1 t\u1eeb c\u00e1c c\u1eb7p s\u1ed1 \u0111\u00f3 <br\/> <\/span><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> Ta c\u00f3: 4 = 4 : 1 = 8 : 2<br\/>N\u00ean ta vi\u1ebft \u0111\u01b0\u1ee3c c\u00e1c s\u1ed1 c\u00f3 hai ch\u1eef s\u1ed1 m\u00e0 ch\u1eef s\u1ed1 h\u00e0ng ch\u1ee5c v\u1edbi ch\u1eef s\u1ed1 h\u00e0ng \u0111\u01a1n v\u1ecb g\u1ea5p k\u00e9m nhau 4 l\u1ea7n l\u00e0: 14; 41; 28; 82 <br\/><span class='basic_pink'>C\u00e1c s\u1ed1 c\u1ea7n \u0111i\u1ec1n l\u00e0: 14; 41; 28; 82<\/span>"}]}],"id_ques":97},{"time":24,"part":[{"title":"\u0110i\u1ec1n s\u1ed1 th\u00edch h\u1ee3p v\u00e0o ch\u1ed7 tr\u1ed1ng","title_trans":"","temp":"fill_the_blank","correct":[[["123"]]],"list":[{"point":10,"width":60,"content":"","type_input":"","ques":"H\u00e3y t\u00ecm s\u1ed1 t\u1ef1 nhi\u00ean c\u00f3 3 ch\u1eef s\u1ed1 bi\u1ebft khi vi\u1ebft th\u00eam ch\u1eef s\u1ed1 3 v\u00e0o b\u00ean ph\u1ea3i s\u1ed1 \u0111\u00f3 ta \u0111\u01b0\u1ee3c s\u1ed1 m\u1edbi. Bi\u1ebft t\u1ed5ng c\u1ee7a s\u1ed1 m\u1edbi v\u00e0 s\u1ed1 \u0111\u00e3 cho l\u00e0 1356. <br\/> S\u1ed1 ban \u0111\u1ea7u l\u00e0: _input_","hint":"Khi vi\u1ebft th\u00eam ch\u1eef s\u1ed1 3 v\u00e0o b\u00ean ph\u1ea3i m\u1ed9t s\u1ed1 c\u00f3 3 ch\u1eef s\u1ed1 th\u00ec s\u1ed1 \u0111\u00f3 t\u0103ng 10 l\u1ea7n v\u00e0 3 \u0111\u01a1n v\u1ecb","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> <b> B\u01b0\u1edbc 1: <\/b> G\u1ecdi s\u1ed1 c\u00f3 3 ch\u1eef s\u1ed1 \u0111\u00f3 l\u00e0 $\\overline{abc}$<br\/> <b> B\u01b0\u1edbc 2: <\/b>Khi vi\u1ebft th\u00eam ch\u1eef s\u1ed1 3 v\u00e0o b\u00ean ph\u1ea3i ta \u0111\u01b0\u1ee3c s\u1ed1 $\\overline{abc3}$ <br\/> <b> B\u01b0\u1edbc 3: <\/b> T\u00ecm $\\overline{abc}$ <br\/>Theo \u0111\u1ec1 b\u00e0i t\u1ed5ng c\u1ee7a s\u1ed1 m\u1edbi v\u00e0 s\u1ed1 ban \u0111\u1ea7u b\u1eb1ng 1356 n\u00ean ta c\u00f3 $\\overline{abc} + \\overline{abc3} = 1356$ <\/span><br\/> <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> <br\/> G\u1ecdi s\u1ed1 c\u00f3 3 ch\u1eef s\u1ed1 \u0111\u00f3 l\u00e0: $\\overline{abc}$ <br\/> Sau khi vi\u1ebft th\u00eam ch\u1eef s\u1ed1 3 v\u00e0o b\u00ean ph\u1ea3i s\u1ed1 \u0111\u00f3 ta \u0111\u01b0\u1ee3c: $\\overline{abc3}$ <br\/> Theo \u0111\u1ec1 b\u00e0i ta c\u00f3: $$\\overline{abc3} + \\overline{abc} = 1356$$ $$\\overline{abc} . 10 + 3 + \\overline{abc} = 1356$$ $$ 11. \\overline{abc} = 1353$$ $$ \\overline{abc} = 123$$<span class='basic_pink'>V\u1eady s\u1ed1 c\u1ea7n t\u00ecm l\u00e0: 123<\/span>"}]}],"id_ques":98},{"time":24,"part":[{"title":"\u0110i\u1ec1n s\u1ed1 th\u00edch h\u1ee3p v\u00e0o ch\u1ed7 tr\u1ed1ng","title_trans":"","temp":"fill_the_blank_random","correct":[[["1530"],["1503"],["1521"],["1512"]]],"list":[{"point":10,"width":60,"content":"","type_input":"","ques":"H\u00e3y vi\u1ebft t\u1eadp h\u1ee3p A c\u00e1c s\u1ed1 t\u1ef1 nhi\u00ean c\u00f3 s\u1ed1 tr\u0103m l\u00e0 15, t\u1ed5ng ch\u1eef s\u1ed1 h\u00e0ng ch\u1ee5c v\u1edbi ch\u1eef s\u1ed1 h\u00e0ng \u0111\u01a1n v\u1ecb l\u00e0 3 <br\/> A = { _input_; _input_; _input_; _input_}","hint":"C\u00e1c s\u1ed1 c\u1ea7n t\u00ecm c\u00f3 d\u1ea1ng $\\overline{15ab}$ sao cho a + b = 3","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> V\u00ec c\u00e1c s\u1ed1 c\u1ea7n t\u00ecm c\u00f3 s\u1ed1 tr\u0103m l\u00e0 15 n\u00ean c\u00f3 d\u1ea1ng $\\overline{15ab}$ <br\/> T\u1ed5ng ch\u1eef s\u1ed1 h\u00e0ng ch\u1ee5c v\u00e0 ch\u1eef s\u1ed1 h\u00e0ng \u0111\u01a1n v\u1ecb l\u00e0 3 n\u00ean: a + b = 3<br\/> <b> B\u01b0\u1edbc 1: <\/b>Vi\u1ebft 3 th\u00e0nh t\u1ed5ng c\u1ee7a hai s\u1ed1 t\u1ef1 nhi\u00ean <br\/> <b> B\u01b0\u1edbc 2: <\/b> Vi\u1ebft c\u00e1c s\u1ed1 t\u1ef1 nhi\u00ean d\u1ea1ng $\\overline{15ab}$ v\u1edbi ch\u1eef s\u1ed1 h\u00e0ng ch\u1ee5c v\u00e0 ch\u1eef s\u1ed1 h\u00e0ng \u0111\u01a1n v\u1ecb l\u00e0 c\u00e1c c\u1eb7p s\u1ed1 v\u1eeba vi\u1ebft \u1edf tr\u00ean <\/span><br\/> <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> <br\/> V\u00ec t\u1eadp h\u1ee3p A g\u1ed3m c\u00e1c s\u1ed1 c\u00f3 s\u1ed1 tr\u0103m l\u00e0 15 n\u00ean t\u1eadp h\u1ee3p A g\u1ed3m c\u00e1c s\u1ed1 d\u1ea1ng $\\overline{15ab}$ <br\/>Ta c\u00f3: 3 = 0 + 3 = 1 + 2 <br\/> V\u1eady A = {1530; 1503; 1521; 1512} <br\/><span class='basic_pink'>C\u00e1c s\u1ed1 c\u1ea7n \u0111i\u1ec1n l\u00e0: 1530; 1503; 1521; 1512<\/span>"}]}],"id_ques":99},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":10,"ques":"S\u1ed1 CDXCV trong h\u1ec7 La M\u00e3 c\u00f3 gi\u00e1 tr\u1ecb b\u1eb1ng s\u1ed1 t\u1ef1 nhi\u00ean n\u00e0o sau \u0111\u00e2y: ","select":["A. 515 ","B. 615 ","C. 495 ","D. 695"],"hint":"Trong h\u1ec7 La M\u00e3 D l\u00e0 500, C l\u00e0 100, V l\u00e0 5, CD l\u00e0 400, XC l\u00e0 90","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn: <\/span> <br\/>\u0110\u1ec3 \u0111\u1ecdc \u0111\u01b0\u1ee3c s\u1ed1 La M\u00e3 ta c\u1ed9ng c\u00e1c gi\u00e1 tr\u1ecb c\u1ee7a c\u00e1c ch\u1eef s\u1ed1 La M\u00e3 trong s\u1ed1 \u0111\u00f3 <br\/> L\u01b0u \u00fd c\u00e1c s\u1ed1 La M\u00e3 \u0111\u1eb7c bi\u1ec7t: IV l\u00e0 4, IX l\u00e0 9; XL l\u00e0 40; XC l\u00e0 90, CD l\u00e0 400, CM l\u00e0 900<br\/> <br\/><\/span><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span> <br\/> <br\/> Gi\u00e1 tr\u1ecb c\u00e1c ch\u1eef s\u1ed1 trong s\u1ed1 CDXCV l\u00e0: <br\/> CD = 400; XC = 90, V l\u00e0 5 <br\/> V\u1eady s\u1ed1 CDXCV = 400 + 90 + 5 = 495<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: C. 495<\/span>","column":2}]}],"id_ques":100}],"lesson":{"save":0,"level":3}}

Điểm của bạn.

Câu hỏi này theo dạng chọn đáp án đúng, sau khi đọc xong câu hỏi, bạn bấm vào một trong số các đáp án mà chương trình đưa ra bên dưới, sau đó bấm vào nút gửi để kiểm tra đáp án và sẵn sàng chuyển sang câu hỏi kế tiếp

Trả lời đúng trong khoảng thời gian quy định bạn sẽ được + số điểm như sau:
Trong khoảng 1 phút đầu tiên + 5 điểm
Trong khoảng 1 phút -> 2 phút + 4 điểm
Trong khoảng 2 phút -> 3 phút + 3 điểm
Trong khoảng 3 phút -> 4 phút + 2 điểm
Trong khoảng 4 phút -> 5 phút + 1 điểm

Quá 5 phút: không được cộng điểm

Tổng thời gian làm mỗi câu (không giới hạn)

Điểm của bạn.

Bấm vào đây nếu phát hiện có lỗi hoặc muốn gửi góp ý