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\newcommand{\titre}{Le car de ramassage}
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    \small Un car de ramassage doit s'arrêter à chaque carrefour d'un quartier, une fois et une seule. Selon le plan c'est possible ou non — et un simple coloriage permet souvent de le dire d'avance, sans essayer.
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\noindent \textbf{Le car part de l'école, au carrefour C, et doit s'arrêter à chaque carrefour exactement une fois.} Il emprunte les rues qu'il veut et n'a pas à toutes les parcourir.\par\addvspace{0.35em}
\begin{center}
\renewcommand{\arraystretch}{1.35}
\begin{tabular}{|c|c|c|c|}
\hline
\cellcolor{black!32}\bfseries Les rues & ⑩ rue Haute & Ⓐ Place de l'Église & Ⓚ Carrefour du Lavoir \\ \hline
① boulevard du Parc & ⑪ venelle du Chat & Ⓑ Fontaine Notre-Dame & Ⓛ Place du Vieux-Puits \\ \hline
② rue de l'Église & ⑫ rue Basse & Ⓒ Place des Tanneurs & Ⓜ Coin du Lavoir \\ \hline
③ rue des Lilas & ⑬ chemin de Ronde & Ⓓ Carrefour de la Mairie & \cellcolor{black!32}\bfseries Les bâtiments \\ \hline
④ passage du Marché & ⑭ sentier des Prés & Ⓔ Rond-point de la Gare & \textbf{a} l'école \\ \hline
⑤ rue du Four & ⑮ rue des Écoles & Ⓕ Carrefour du Moulin & \textbf{b} le lavoir \\ \hline
⑥ rue du Stade & ⑯ rue du Puits & Ⓖ Rond-point du Stade & \textbf{c} la salle des fêtes \\ \hline
⑦ rue Pasteur & ⑰ rue de la Poste & Ⓗ Carrefour Saint-Roch & \textbf{d} la gendarmerie \\ \hline
⑧ avenue de la Gare & ⑱ allée des Peupliers & Ⓘ Rond-point des Vaches &  \\ \hline
⑨ chemin du Lavoir & \cellcolor{black!32}\bfseries Les carrefours & Ⓙ Place de la Fontaine &  \\ \hline
\end{tabular}
\end{center}
\noindent{\small\itshape Légende du plan}\par\addvspace{0.4em}
\begin{enumerate}
  \item Colorier les carrefours du plan avec \textbf{deux couleurs}, de sorte que deux carrefours \textbf{reliés par une rue} ne soient jamais de la même couleur. Combien y en a-t-il de chaque couleur ?
  \item Le car roule d'un carrefour au suivant. Que peut-on dire de la \textbf{couleur} des arrêts successifs ? Qu'en déduire sur les couleurs des arrêts d'une tournée qui les dessert tous ?
  \item \textbf{Le car peut-il desservir tous les carrefours, une fois chacun, et revenir à l'école ?} Si oui, décrire un trajet ; sinon, démontrer que c'est impossible.
  \item \textbf{Et s'il n'est pas obligé de revenir à l'école ?} Même consigne.
\end{enumerate}
\newpage
\section*{\textcolor{red}{Correction}}
\needspace{5\baselineskip}
\subsection*{\textcolor{red}{Le car de ramassage — Correction}}
\needspace{3\baselineskip}
\begin{center}
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\draw[line width=0.5pt] (7.675,5.192) -- (7.945,5.117) -- (8.217,5.048) -- (8.49,4.986) -- (8.765,4.93) -- (9.042,4.88) -- (9.319,4.837) -- (9.598,4.801) -- (9.877,4.771) -- (10.157,4.747) -- (10.437,4.731) -- (10.717,4.72) -- (10.998,4.717) -- (11.279,4.72) -- (11.559,4.73);
\draw[line width=0.5pt] (7.675,5.192) -- (7.728,4.938) -- (7.774,4.683) -- (7.815,4.427) -- (7.85,4.169) -- (7.879,3.911) -- (7.901,3.653) -- (7.918,3.394) -- (7.928,3.134) -- (7.933,2.874) -- (7.931,2.615) -- (7.923,2.355) -- (7.909,2.096) -- (7.889,1.837) -- (7.863,1.579);
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\draw[line width=0.5pt] (1.559,5.029) -- (1.623,4.776) -- (1.681,4.521) -- (1.734,4.265) -- (1.78,4.007) -- (1.82,3.749) -- (1.854,3.489) -- (1.882,3.229) -- (1.904,2.968) -- (1.919,2.707) -- (1.929,2.446) -- (1.932,2.184) -- (1.929,1.923) -- (1.92,1.661) -- (1.905,1.401);
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\draw[line width=0.5pt] (4.269,5.029) -- (4.326,4.831) -- (4.379,4.632) -- (4.427,4.432) -- (4.47,4.23) -- (4.508,4.028) -- (4.542,3.824) -- (4.571,3.62) -- (4.595,3.415) -- (4.614,3.21) -- (4.629,3.005) -- (4.639,2.799) -- (4.643,2.593) -- (4.643,2.387) -- (4.638,2.181);
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\filldraw[fill=white, draw=black, line width=0.5pt] (8.439,11.311) -- (8.411,11.454) -- (8.33,11.575) -- (8.209,11.656) -- (8.066,11.685) -- (7.923,11.656) -- (7.802,11.575) -- (7.721,11.454) -- (7.693,11.311) -- (7.721,11.169) -- (7.802,11.047) -- (7.923,10.967) -- (8.066,10.938) -- (8.209,10.967) -- (8.33,11.047) -- (8.411,11.169) -- cycle;
\filldraw[fill=black!38, draw=black, line width=0.5pt] (11.565,11.083) -- (11.537,11.226) -- (11.456,11.347) -- (11.335,11.428) -- (11.192,11.456) -- (11.049,11.428) -- (10.928,11.347) -- (10.847,11.226) -- (10.819,11.083) -- (10.847,10.94) -- (10.928,10.819) -- (11.049,10.738) -- (11.192,10.71) -- (11.335,10.738) -- (11.456,10.819) -- (11.537,10.94) -- cycle;
\filldraw[fill=black!38, draw=black, line width=0.5pt] (1.994,8.73) -- (1.965,8.873) -- (1.884,8.994) -- (1.763,9.075) -- (1.621,9.103) -- (1.478,9.075) -- (1.357,8.994) -- (1.276,8.873) -- (1.247,8.73) -- (1.276,8.587) -- (1.357,8.466) -- (1.478,8.385) -- (1.621,8.357) -- (1.763,8.385) -- (1.884,8.466) -- (1.965,8.587) -- cycle;
\filldraw[fill=white, draw=black, line width=0.5pt] (5.438,8.697) -- (5.41,8.84) -- (5.329,8.961) -- (5.208,9.042) -- (5.065,9.07) -- (4.922,9.042) -- (4.801,8.961) -- (4.72,8.84) -- (4.692,8.697) -- (4.72,8.554) -- (4.801,8.433) -- (4.922,8.352) -- (5.065,8.324) -- (5.208,8.352) -- (5.329,8.433) -- (5.41,8.554) -- cycle;
\filldraw[fill=white, draw=black, line width=0.5pt] (11.138,8.37) -- (11.11,8.513) -- (11.029,8.634) -- (10.908,8.715) -- (10.765,8.744) -- (10.622,8.715) -- (10.501,8.634) -- (10.42,8.513) -- (10.392,8.37) -- (10.42,8.228) -- (10.501,8.106) -- (10.622,8.026) -- (10.765,7.997) -- (10.908,8.026) -- (11.029,8.106) -- (11.11,8.228) -- cycle;
\filldraw[fill=black!38, draw=black, line width=0.5pt] (8.825,8.2) -- (8.797,8.343) -- (8.716,8.464) -- (8.595,8.545) -- (8.452,8.573) -- (8.309,8.545) -- (8.188,8.464) -- (8.107,8.343) -- (8.079,8.2) -- (8.107,8.057) -- (8.188,7.936) -- (8.309,7.855) -- (8.452,7.827) -- (8.595,7.855) -- (8.716,7.936) -- (8.797,8.057) -- cycle;
\filldraw[fill=white, draw=black, line width=0.5pt] (8.048,5.192) -- (8.02,5.335) -- (7.939,5.456) -- (7.818,5.537) -- (7.675,5.565) -- (7.532,5.537) -- (7.411,5.456) -- (7.33,5.335) -- (7.301,5.192) -- (7.33,5.049) -- (7.411,4.928) -- (7.532,4.847) -- (7.675,4.819) -- (7.818,4.847) -- (7.939,4.928) -- (8.02,5.049) -- cycle;
\filldraw[fill=white, draw=black, line width=0.5pt] (1.932,5.029) -- (1.904,5.172) -- (1.823,5.293) -- (1.702,5.374) -- (1.559,5.402) -- (1.416,5.374) -- (1.295,5.293) -- (1.214,5.172) -- (1.186,5.029) -- (1.214,4.886) -- (1.295,4.765) -- (1.416,4.684) -- (1.559,4.656) -- (1.702,4.684) -- (1.823,4.765) -- (1.904,4.886) -- cycle;
\filldraw[fill=black!38, draw=black, line width=0.5pt] (4.642,5.029) -- (4.614,5.172) -- (4.533,5.293) -- (4.412,5.374) -- (4.269,5.402) -- (4.126,5.374) -- (4.005,5.293) -- (3.924,5.172) -- (3.896,5.029) -- (3.924,4.886) -- (4.005,4.765) -- (4.126,4.684) -- (4.269,4.656) -- (4.412,4.684) -- (4.533,4.765) -- (4.614,4.886) -- cycle;
\filldraw[fill=black!38, draw=black, line width=0.5pt] (11.932,4.73) -- (11.904,4.872) -- (11.823,4.993) -- (11.702,5.074) -- (11.559,5.103) -- (11.416,5.074) -- (11.295,4.993) -- (11.214,4.872) -- (11.186,4.73) -- (11.214,4.587) -- (11.295,4.466) -- (11.416,4.385) -- (11.559,4.356) -- (11.702,4.385) -- (11.823,4.466) -- (11.904,4.587) -- cycle;
\filldraw[fill=white, draw=black, line width=0.5pt] (5.011,2.181) -- (4.983,2.324) -- (4.902,2.445) -- (4.781,2.526) -- (4.638,2.554) -- (4.495,2.526) -- (4.374,2.445) -- (4.293,2.324) -- (4.265,2.181) -- (4.293,2.038) -- (4.374,1.917) -- (4.495,1.836) -- (4.638,1.808) -- (4.781,1.836) -- (4.902,1.917) -- (4.983,2.038) -- cycle;
\filldraw[fill=black!38, draw=black, line width=0.5pt] (8.236,1.579) -- (8.207,1.722) -- (8.127,1.843) -- (8.005,1.924) -- (7.863,1.953) -- (7.72,1.924) -- (7.599,1.843) -- (7.518,1.722) -- (7.489,1.579) -- (7.518,1.437) -- (7.599,1.316) -- (7.72,1.235) -- (7.863,1.206) -- (8.005,1.235) -- (8.127,1.316) -- (8.207,1.437) -- cycle;
\filldraw[fill=black!38, draw=black, line width=0.5pt] (2.278,1.401) -- (2.25,1.543) -- (2.169,1.664) -- (2.048,1.745) -- (1.905,1.774) -- (1.762,1.745) -- (1.641,1.664) -- (1.56,1.543) -- (1.532,1.401) -- (1.56,1.258) -- (1.641,1.137) -- (1.762,1.056) -- (1.905,1.027) -- (2.048,1.056) -- (2.169,1.137) -- (2.25,1.258) -- cycle;
\filldraw[fill=white, draw=black, line width=0.5pt] (9.648,11.067) -- (9.767,11.086) -- (9.874,11.141) -- (9.959,11.226) -- (10.014,11.333) -- (10.032,11.452) -- (10.014,11.571) -- (9.959,11.678) -- (9.874,11.763) -- (9.767,11.817) -- (9.648,11.836) -- (9.648,11.836) -- (9.529,11.817) -- (9.422,11.763) -- (9.337,11.678) -- (9.282,11.571) -- (9.263,11.452) -- (9.282,11.333) -- (9.337,11.226) -- (9.422,11.141) -- (9.529,11.086) -- (9.648,11.067) -- cycle;
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\filldraw[fill=white, draw=black, line width=0.5pt] (8.769,9.434) -- (8.888,9.453) -- (8.995,9.508) -- (9.08,9.593) -- (9.135,9.7) -- (9.154,9.819) -- (9.135,9.938) -- (9.08,10.045) -- (8.995,10.13) -- (8.888,10.185) -- (8.769,10.204) -- (8.769,10.204) -- (8.65,10.185) -- (8.543,10.13) -- (8.458,10.045) -- (8.403,9.938) -- (8.385,9.819) -- (8.403,9.7) -- (8.458,9.593) -- (8.543,9.508) -- (8.65,9.453) -- (8.769,9.434) -- cycle;
\node at (8.769,9.819) {\scalebox{1.638}{\small 2}};
\filldraw[fill=white, draw=black, line width=0.5pt] (11.246,9.3) -- (11.365,9.319) -- (11.472,9.373) -- (11.558,9.458) -- (11.612,9.566) -- (11.631,9.684) -- (11.612,9.803) -- (11.558,9.91) -- (11.472,9.996) -- (11.365,10.05) -- (11.246,10.069) -- (11.246,10.069) -- (11.128,10.05) -- (11.02,9.996) -- (10.935,9.91) -- (10.881,9.803) -- (10.862,9.684) -- (10.881,9.566) -- (10.935,9.458) -- (11.02,9.373) -- (11.128,9.319) -- (11.246,9.3) -- cycle;
\node at (11.246,9.684) {\scalebox{1.638}{\small 3}};
\filldraw[fill=white, draw=black, line width=0.5pt] (3.348,8.856) -- (3.467,8.874) -- (3.574,8.929) -- (3.659,9.014) -- (3.713,9.121) -- (3.732,9.24) -- (3.713,9.359) -- (3.659,9.466) -- (3.574,9.551) -- (3.467,9.606) -- (3.348,9.625) -- (3.348,9.625) -- (3.229,9.606) -- (3.122,9.551) -- (3.037,9.466) -- (2.982,9.359) -- (2.963,9.24) -- (2.982,9.121) -- (3.037,9.014) -- (3.122,8.929) -- (3.229,8.874) -- (3.348,8.856) -- cycle;
\node at (3.348,9.24) {\scalebox{1.638}{\small 4}};
\filldraw[fill=white, draw=black, line width=0.5pt] (1.822,6.491) -- (1.94,6.51) -- (2.048,6.564) -- (2.133,6.649) -- (2.187,6.757) -- (2.206,6.876) -- (2.187,6.994) -- (2.133,7.102) -- (2.048,7.187) -- (1.94,7.241) -- (1.822,7.26) -- (1.822,7.26) -- (1.703,7.241) -- (1.596,7.187) -- (1.51,7.102) -- (1.456,6.994) -- (1.437,6.876) -- (1.456,6.757) -- (1.51,6.649) -- (1.596,6.564) -- (1.703,6.51) -- (1.822,6.491) -- cycle;
\node at (1.822,6.876) {\scalebox{1.638}{\small 5}};
\filldraw[fill=white, draw=black, line width=0.5pt] (6.835,8.584) -- (6.954,8.603) -- (7.061,8.658) -- (7.146,8.743) -- (7.2,8.85) -- (7.219,8.969) -- (7.2,9.088) -- (7.146,9.195) -- (7.061,9.28) -- (6.954,9.335) -- (6.835,9.353) -- (6.835,9.353) -- (6.716,9.335) -- (6.609,9.28) -- (6.524,9.195) -- (6.469,9.088) -- (6.45,8.969) -- (6.469,8.85) -- (6.524,8.743) -- (6.609,8.658) -- (6.716,8.603) -- (6.835,8.584) -- cycle;
\node at (6.835,8.969) {\scalebox{1.638}{\small 6}};
\filldraw[fill=white, draw=black, line width=0.5pt] (4.891,6.43) -- (5.01,6.449) -- (5.117,6.503) -- (5.202,6.588) -- (5.257,6.695) -- (5.276,6.814) -- (5.257,6.933) -- (5.202,7.04) -- (5.117,7.125) -- (5.01,7.18) -- (4.891,7.199) -- (4.891,7.199) -- (4.772,7.18) -- (4.665,7.125) -- (4.58,7.04) -- (4.526,6.933) -- (4.507,6.814) -- (4.526,6.695) -- (4.58,6.588) -- (4.665,6.503) -- (4.772,6.449) -- (4.891,6.43) -- cycle;
\node at (4.891,6.814) {\scalebox{1.638}{\small 7}};
\filldraw[fill=white, draw=black, line width=0.5pt] (11.688,6.28) -- (11.807,6.299) -- (11.914,6.354) -- (11.999,6.439) -- (12.053,6.546) -- (12.072,6.665) -- (12.053,6.783) -- (11.999,6.891) -- (11.914,6.976) -- (11.807,7.03) -- (11.688,7.049) -- (11.688,7.049) -- (11.569,7.03) -- (11.462,6.976) -- (11.377,6.891) -- (11.322,6.783) -- (11.303,6.665) -- (11.322,6.546) -- (11.377,6.439) -- (11.462,6.354) -- (11.569,6.299) -- (11.688,6.28) -- cycle;
\node at (11.688,6.665) {\scalebox{1.638}{\small 8}};
\filldraw[fill=white, draw=black, line width=0.5pt] (9.644,7.422) -- (9.762,7.441) -- (9.87,7.495) -- (9.955,7.58) -- (10.009,7.688) -- (10.028,7.806) -- (10.009,7.925) -- (9.955,8.032) -- (9.87,8.117) -- (9.762,8.172) -- (9.644,8.191) -- (9.644,8.191) -- (9.525,8.172) -- (9.418,8.117) -- (9.333,8.032) -- (9.278,7.925) -- (9.259,7.806) -- (9.278,7.688) -- (9.333,7.58) -- (9.418,7.495) -- (9.525,7.441) -- (9.644,7.422) -- cycle;
\node at (9.644,7.806) {\scalebox{1.638}{\small 9}};
\filldraw[fill=white, draw=black, line width=0.5pt] (8.741,6.183) -- (8.86,6.202) -- (8.967,6.257) -- (9.052,6.342) -- (9.106,6.449) -- (9.125,6.568) -- (9.106,6.687) -- (9.052,6.794) -- (8.967,6.879) -- (8.86,6.934) -- (8.741,6.952) -- (8.379,6.952) -- (8.26,6.934) -- (8.153,6.879) -- (8.068,6.794) -- (8.013,6.687) -- (7.994,6.568) -- (8.013,6.449) -- (8.068,6.342) -- (8.153,6.257) -- (8.26,6.202) -- (8.379,6.183) -- cycle;
\node at (8.56,6.568) {\scalebox{1.638}{\small 10}};
\filldraw[fill=white, draw=black, line width=0.5pt] (9.824,4.798) -- (9.943,4.817) -- (10.05,4.871) -- (10.135,4.956) -- (10.19,5.064) -- (10.209,5.182) -- (10.19,5.301) -- (10.135,5.408) -- (10.05,5.494) -- (9.943,5.548) -- (9.824,5.567) -- (9.462,5.567) -- (9.343,5.548) -- (9.236,5.494) -- (9.151,5.408) -- (9.097,5.301) -- (9.078,5.182) -- (9.097,5.064) -- (9.151,4.956) -- (9.236,4.871) -- (9.343,4.817) -- (9.462,4.798) -- cycle;
\node at (9.643,5.182) {\scalebox{1.638}{\small 11}};
\filldraw[fill=white, draw=black, line width=0.5pt] (7.715,2.989) -- (7.833,3.008) -- (7.941,3.062) -- (8.026,3.148) -- (8.08,3.255) -- (8.099,3.374) -- (8.08,3.492) -- (8.026,3.6) -- (7.941,3.685) -- (7.833,3.739) -- (7.715,3.758) -- (7.353,3.758) -- (7.234,3.739) -- (7.127,3.685) -- (7.042,3.6) -- (6.987,3.492) -- (6.968,3.374) -- (6.987,3.255) -- (7.042,3.148) -- (7.127,3.062) -- (7.234,3.008) -- (7.353,2.989) -- cycle;
\node at (7.534,3.374) {\scalebox{1.638}{\small 12}};
\filldraw[fill=white, draw=black, line width=0.5pt] (2.909,4.919) -- (3.028,4.938) -- (3.135,4.993) -- (3.22,5.078) -- (3.275,5.185) -- (3.294,5.304) -- (3.275,5.423) -- (3.22,5.53) -- (3.135,5.615) -- (3.028,5.669) -- (2.909,5.688) -- (2.547,5.688) -- (2.429,5.669) -- (2.321,5.615) -- (2.236,5.53) -- (2.182,5.423) -- (2.163,5.304) -- (2.182,5.185) -- (2.236,5.078) -- (2.321,4.993) -- (2.429,4.938) -- (2.547,4.919) -- cycle;
\node at (2.728,5.304) {\scalebox{1.638}{\small 13}};
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\noindent{\small\itshape Deux carrefours reliés par une rue n'ont jamais la même couleur.}\par\addvspace{0.4em}
\noindent \textbf{1.} Le coloriage est \textbf{forcé} : une fois la couleur d'un carrefour choisie, celle de tous les autres suit, de proche en proche.\par\addvspace{0.35em}
\begin{center}
\renewcommand{\arraystretch}{1.35}
\begin{tabular}{|c|c|c|}
\hline
\cellcolor{blue!7}\bfseries Couleur & \cellcolor{blue!7}\bfseries Carrefours & \cellcolor{blue!7}\bfseries Nombre \\ \hline
sombres & B, C, F, I, J, L, M & 7 \\ \hline
clairs & A, D, E, G, H, K & 6 \\ \hline
\end{tabular}
\end{center}
\noindent{\color{red!80!black}\bfseries Il y a \textbf{7} carrefours sombres et \textbf{6} clairs. Il y en a donc \textbf{1 de plus} du côté des sombres.}\par\addvspace{0.4em}
\noindent \textbf{2.}\par\addvspace{0.35em}
\noindent{\color{green!45!black}\textbf{Le raisonnement clé.} Chaque rue relie un carrefour sombre à un carrefour clair. Donc à chaque fois que le car roule, il \textbf{change de couleur} : ses arrêts sont sombre, clair, sombre, clair\dots{} \textbf{en alternance}.}\par\addvspace{0.4em}
\noindent{\color{red!80!black}\bfseries Une tournée qui dessert les 13 carrefours alterne donc les deux couleurs d'un bout à l'autre : elle en utilise \textbf{autant de chaque, à un près}. Et si elle en utilise un de plus d'une couleur, c'est forcément celle de son \textbf{départ} et de son \textbf{arrivée}.}\par\addvspace{0.4em}
\noindent \textbf{3.}\par\addvspace{0.35em}
\noindent{\color{red!80!black}\bfseries \textbf{Non.} Un circuit revient à son point de départ : il compte autant d'arrêts sombres que de clairs. Or ce quartier a 7 carrefours sombres et 6 clairs — c'est impossible.}\par\addvspace{0.4em}
\noindent \textbf{4.}\par\addvspace{0.35em}
\noindent{\color{red!80!black}\bfseries \textbf{Oui}, à condition de ne pas revenir. Un trajet possible au départ de \textbf{C} :}\par\addvspace{0.4em}
\newpage
\noindent \textbf{Le trajet du car}\par\addvspace{0.35em}
\noindent Le car sort de l'école et prend le \textbf{passage du Marché ④} vers l'est jusqu'à Carrefour de la Mairie \textbf{(D)}.\par\addvspace{0.35em}
\noindent Il continue tout droit dans la \textbf{rue du Stade ⑥}, vers l'est, jusqu'à Carrefour du Moulin \textbf{(F)}.\par\addvspace{0.35em}
\noindent Il tourne à gauche dans la \textbf{rue de l'Église ②}, vers le nord, jusqu'à Place de l'Église \textbf{(A)}.\par\addvspace{0.35em}
\noindent Il tourne à droite dans le \textbf{boulevard du Parc ①}, vers l'est, jusqu'à Fontaine Notre-Dame \textbf{(B)}.\par\addvspace{0.35em}
\noindent Il tourne à droite dans la \textbf{rue des Lilas ③}, vers le sud, jusqu'à Rond-point de la Gare \textbf{(E)}.\par\addvspace{0.35em}
\noindent Il continue tout droit dans l'\textbf{avenue de la Gare ⑧}, vers le sud, jusqu'à Place de la Fontaine \textbf{(J)}.\par\addvspace{0.35em}
\noindent Il tourne à droite dans la \textbf{venelle du Chat ⑪}, vers l'ouest, jusqu'à Rond-point du Stade \textbf{(G)}.\par\addvspace{0.35em}
\noindent Il continue tout droit dans la \textbf{rue des Écoles ⑮}, vers l'ouest, jusqu'à Rond-point des Vaches \textbf{(I)}.\par\addvspace{0.35em}
\noindent Il continue tout droit dans le \textbf{chemin de Ronde ⑬}, vers l'ouest, jusqu'à Carrefour Saint-Roch \textbf{(H)}.\par\addvspace{0.35em}
\noindent Il tourne à gauche dans le \textbf{sentier des Prés ⑭}, vers le sud, jusqu'à Coin du Lavoir \textbf{(M)}.\par\addvspace{0.35em}
\noindent Il tourne à gauche dans l'\textbf{allée des Peupliers ⑱}, vers l'est, jusqu'à Carrefour du Lavoir \textbf{(K)}.\par\addvspace{0.35em}
\noindent Il continue tout droit dans la \textbf{rue de la Poste ⑰}, vers l'est, jusqu'à Place du Vieux-Puits \textbf{(L)}.\par\addvspace{0.35em}
\noindent{\color{red!80!black}\bfseries Les 13 carrefours ont été desservis une fois chacun. Le car termine loin de l'école : c'est permis ici, mais pas à la question 3.}\par\addvspace{0.4em}
\end{document}
