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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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\end{center}
\noindent \textbf{Le car part de l'école, au carrefour E, 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 allée des Peupliers & Ⓑ Place de la Fontaine & Ⓛ Fontaine Notre-Dame \\ \hline
① rue Verte & ⑪ rue du Four & Ⓒ Placette des Ormes & Ⓜ Place de l'Église \\ \hline
② rue du Puits & ⑫ rue du Moulin & Ⓓ Rond-point de la Poste & \cellcolor{black!32}\bfseries Les bâtiments \\ \hline
③ chemin Creux & ⑬ rue Pasteur & Ⓔ Rond-point du Pont & \textbf{a} l'école \\ \hline
④ impasse du Vieux-Four & ⑭ rue Neuve & Ⓕ Carrefour Saint-Roch & \textbf{b} la pharmacie \\ \hline
⑤ chemin des Vignes & ⑮ quai aux Fleurs & Ⓖ Rond-point des Vaches & \textbf{c} le gymnase \\ \hline
⑥ rue Basse & ⑯ rue des Lilas & Ⓗ Carrefour du Moulin & \textbf{d} le lavoir \\ \hline
⑦ chemin de Ronde & ⑰ avenue de la Gare & Ⓘ Carrefour du Lavoir &  \\ \hline
⑧ sentier des Prés & \cellcolor{black!32}\bfseries Les carrefours & Ⓙ Place Sainte-Croix &  \\ \hline
⑨ boulevard du Parc & Ⓐ Coin du Lavoir & Ⓚ Carrefour de l'Hôpital &  \\ \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] (1.311,4.399) -- (1.571,4.413) -- (1.831,4.434) -- (2.09,4.461) -- (2.349,4.494) -- (2.607,4.533) -- (2.864,4.578) -- (3.12,4.629) -- (3.374,4.686) -- (3.628,4.749) -- (3.879,4.818) -- (4.129,4.893) -- (4.377,4.974) -- (4.623,5.06) -- (4.866,5.153);
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\filldraw[fill=white, draw=black, line width=0.5pt] (7.765,11.559) -- (7.737,11.702) -- (7.656,11.823) -- (7.535,11.904) -- (7.392,11.932) -- (7.249,11.904) -- (7.128,11.823) -- (7.047,11.702) -- (7.019,11.559) -- (7.047,11.416) -- (7.128,11.295) -- (7.249,11.214) -- (7.392,11.186) -- (7.535,11.214) -- (7.656,11.295) -- (7.737,11.416) -- cycle;
\filldraw[fill=black!38, draw=black, line width=0.5pt] (11.003,11.303) -- (10.974,11.445) -- (10.893,11.566) -- (10.772,11.647) -- (10.629,11.676) -- (10.487,11.647) -- (10.366,11.566) -- (10.285,11.445) -- (10.256,11.303) -- (10.285,11.16) -- (10.366,11.039) -- (10.487,10.958) -- (10.629,10.929) -- (10.772,10.958) -- (10.893,11.039) -- (10.974,11.16) -- cycle;
\filldraw[fill=white, draw=black, line width=0.5pt] (2.202,10.67) -- (2.174,10.813) -- (2.093,10.934) -- (1.972,11.015) -- (1.829,11.043) -- (1.686,11.015) -- (1.565,10.934) -- (1.484,10.813) -- (1.456,10.67) -- (1.484,10.527) -- (1.565,10.406) -- (1.686,10.325) -- (1.829,10.297) -- (1.972,10.325) -- (2.093,10.406) -- (2.174,10.527) -- cycle;
\filldraw[fill=black!38, draw=black, line width=0.5pt] (8.115,8.338) -- (8.086,8.48) -- (8.005,8.602) -- (7.884,8.682) -- (7.741,8.711) -- (7.599,8.682) -- (7.478,8.602) -- (7.397,8.48) -- (7.368,8.338) -- (7.397,8.195) -- (7.478,8.074) -- (7.599,7.993) -- (7.741,7.964) -- (7.884,7.993) -- (8.005,8.074) -- (8.086,8.195) -- cycle;
\filldraw[fill=white, draw=black, line width=0.5pt] (4.584,7.915) -- (4.556,8.058) -- (4.475,8.179) -- (4.354,8.26) -- (4.211,8.288) -- (4.068,8.26) -- (3.947,8.179) -- (3.866,8.058) -- (3.838,7.915) -- (3.866,7.772) -- (3.947,7.651) -- (4.068,7.57) -- (4.211,7.542) -- (4.354,7.57) -- (4.475,7.651) -- (4.556,7.772) -- cycle;
\filldraw[fill=black!38, draw=black, line width=0.5pt] (1.996,7.914) -- (1.967,8.057) -- (1.886,8.178) -- (1.765,8.259) -- (1.623,8.287) -- (1.48,8.259) -- (1.359,8.178) -- (1.278,8.057) -- (1.249,7.914) -- (1.278,7.771) -- (1.359,7.65) -- (1.48,7.569) -- (1.623,7.541) -- (1.765,7.569) -- (1.886,7.65) -- (1.967,7.771) -- cycle;
\filldraw[fill=white, draw=black, line width=0.5pt] (11.084,7.648) -- (11.056,7.791) -- (10.975,7.912) -- (10.854,7.993) -- (10.711,8.021) -- (10.568,7.993) -- (10.447,7.912) -- (10.366,7.791) -- (10.338,7.648) -- (10.366,7.505) -- (10.447,7.384) -- (10.568,7.303) -- (10.711,7.275) -- (10.854,7.303) -- (10.975,7.384) -- (11.056,7.505) -- cycle;
\filldraw[fill=white, draw=black, line width=0.5pt] (8.339,5.203) -- (8.311,5.346) -- (8.23,5.467) -- (8.109,5.548) -- (7.966,5.576) -- (7.823,5.548) -- (7.702,5.467) -- (7.621,5.346) -- (7.593,5.203) -- (7.621,5.06) -- (7.702,4.939) -- (7.823,4.858) -- (7.966,4.83) -- (8.109,4.858) -- (8.23,4.939) -- (8.311,5.06) -- cycle;
\filldraw[fill=black!38, draw=black, line width=0.5pt] (5.24,5.153) -- (5.211,5.296) -- (5.13,5.417) -- (5.009,5.498) -- (4.866,5.526) -- (4.724,5.498) -- (4.603,5.417) -- (4.522,5.296) -- (4.493,5.153) -- (4.522,5.01) -- (4.603,4.889) -- (4.724,4.808) -- (4.866,4.78) -- (5.009,4.808) -- (5.13,4.889) -- (5.211,5.01) -- cycle;
\filldraw[fill=black!38, draw=black, line width=0.5pt] (11.26,4.874) -- (11.231,5.016) -- (11.151,5.137) -- (11.029,5.218) -- (10.887,5.247) -- (10.744,5.218) -- (10.623,5.137) -- (10.542,5.016) -- (10.513,4.874) -- (10.542,4.731) -- (10.623,4.61) -- (10.744,4.529) -- (10.887,4.5) -- (11.029,4.529) -- (11.151,4.61) -- (11.231,4.731) -- cycle;
\filldraw[fill=white, draw=black, line width=0.5pt] (1.684,4.399) -- (1.656,4.541) -- (1.575,4.662) -- (1.454,4.743) -- (1.311,4.772) -- (1.168,4.743) -- (1.047,4.662) -- (0.966,4.541) -- (0.938,4.399) -- (0.966,4.256) -- (1.047,4.135) -- (1.168,4.054) -- (1.311,4.025) -- (1.454,4.054) -- (1.575,4.135) -- (1.656,4.256) -- cycle;
\filldraw[fill=black!38, draw=black, line width=0.5pt] (1.831,2.088) -- (1.803,2.231) -- (1.722,2.352) -- (1.601,2.433) -- (1.458,2.461) -- (1.315,2.433) -- (1.194,2.352) -- (1.113,2.231) -- (1.085,2.088) -- (1.113,1.945) -- (1.194,1.824) -- (1.315,1.743) -- (1.458,1.715) -- (1.601,1.743) -- (1.722,1.824) -- (1.803,1.945) -- cycle;
\filldraw[fill=white, draw=black, line width=0.5pt] (5.174,1.559) -- (5.145,1.702) -- (5.065,1.823) -- (4.943,1.904) -- (4.801,1.932) -- (4.658,1.904) -- (4.537,1.823) -- (4.456,1.702) -- (4.427,1.559) -- (4.456,1.416) -- (4.537,1.295) -- (4.658,1.214) -- (4.801,1.186) -- (4.943,1.214) -- (5.065,1.295) -- (5.145,1.416) -- cycle;
\filldraw[fill=white, draw=black, line width=0.5pt] (9.03,11.296) -- (9.149,11.315) -- (9.256,11.37) -- (9.341,11.455) -- (9.396,11.562) -- (9.415,11.681) -- (9.396,11.799) -- (9.341,11.907) -- (9.256,11.992) -- (9.149,12.046) -- (9.03,12.065) -- (9.03,12.065) -- (8.912,12.046) -- (8.804,11.992) -- (8.719,11.907) -- (8.665,11.799) -- (8.646,11.681) -- (8.665,11.562) -- (8.719,11.455) -- (8.804,11.37) -- (8.912,11.315) -- (9.03,11.296) -- cycle;
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\filldraw[fill=white, draw=black, line width=0.5pt] (7.317,9.537) -- (7.436,9.556) -- (7.543,9.61) -- (7.628,9.695) -- (7.683,9.802) -- (7.702,9.921) -- (7.683,10.04) -- (7.628,10.147) -- (7.543,10.232) -- (7.436,10.287) -- (7.317,10.306) -- (7.317,10.306) -- (7.198,10.287) -- (7.091,10.232) -- (7.006,10.147) -- (6.952,10.04) -- (6.933,9.921) -- (6.952,9.802) -- (7.006,9.695) -- (7.091,9.61) -- (7.198,9.556) -- (7.317,9.537) -- cycle;
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\filldraw[fill=white, draw=black, line width=0.5pt] (10.904,9.096) -- (11.023,9.115) -- (11.13,9.169) -- (11.215,9.254) -- (11.27,9.362) -- (11.288,9.48) -- (11.27,9.599) -- (11.215,9.706) -- (11.13,9.792) -- (11.023,9.846) -- (10.904,9.865) -- (10.904,9.865) -- (10.785,9.846) -- (10.678,9.792) -- (10.593,9.706) -- (10.538,9.599) -- (10.519,9.48) -- (10.538,9.362) -- (10.593,9.254) -- (10.678,9.169) -- (10.785,9.115) -- (10.904,9.096) -- cycle;
\node at (10.904,9.48) {\scalebox{1.574}{\small 3}};
\filldraw[fill=white, draw=black, line width=0.5pt] (2.223,8.87) -- (2.342,8.889) -- (2.449,8.944) -- (2.534,9.029) -- (2.588,9.136) -- (2.607,9.255) -- (2.588,9.374) -- (2.534,9.481) -- (2.449,9.566) -- (2.342,9.621) -- (2.223,9.639) -- (2.223,9.639) -- (2.104,9.621) -- (1.997,9.566) -- (1.912,9.481) -- (1.857,9.374) -- (1.838,9.255) -- (1.857,9.136) -- (1.912,9.029) -- (1.997,8.944) -- (2.104,8.889) -- (2.223,8.87) -- cycle;
\node at (2.223,9.255) {\scalebox{1.574}{\small 4}};
\filldraw[fill=white, draw=black, line width=0.5pt] (9.285,7.86) -- (9.404,7.879) -- (9.511,7.934) -- (9.596,8.019) -- (9.651,8.126) -- (9.669,8.245) -- (9.651,8.364) -- (9.596,8.471) -- (9.511,8.556) -- (9.404,8.61) -- (9.285,8.629) -- (9.285,8.629) -- (9.166,8.61) -- (9.059,8.556) -- (8.974,8.471) -- (8.919,8.364) -- (8.9,8.245) -- (8.919,8.126) -- (8.974,8.019) -- (9.059,7.934) -- (9.166,7.879) -- (9.285,7.86) -- cycle;
\node at (9.285,8.245) {\scalebox{1.574}{\small 5}};
\filldraw[fill=white, draw=black, line width=0.5pt] (8.367,6.423) -- (8.485,6.442) -- (8.593,6.496) -- (8.678,6.581) -- (8.732,6.688) -- (8.751,6.807) -- (8.732,6.926) -- (8.678,7.033) -- (8.593,7.118) -- (8.485,7.173) -- (8.367,7.192) -- (8.367,7.192) -- (8.248,7.173) -- (8.141,7.118) -- (8.056,7.033) -- (8.001,6.926) -- (7.982,6.807) -- (8.001,6.688) -- (8.056,6.581) -- (8.141,6.496) -- (8.248,6.442) -- (8.367,6.423) -- cycle;
\node at (8.367,6.807) {\scalebox{1.574}{\small 6}};
\filldraw[fill=white, draw=black, line width=0.5pt] (5.948,7.978) -- (6.067,7.997) -- (6.174,8.051) -- (6.259,8.136) -- (6.314,8.244) -- (6.332,8.363) -- (6.314,8.481) -- (6.259,8.589) -- (6.174,8.674) -- (6.067,8.728) -- (5.948,8.747) -- (5.948,8.747) -- (5.829,8.728) -- (5.722,8.674) -- (5.637,8.589) -- (5.582,8.481) -- (5.563,8.363) -- (5.582,8.244) -- (5.637,8.136) -- (5.722,8.051) -- (5.829,7.997) -- (5.948,7.978) -- cycle;
\node at (5.948,8.363) {\scalebox{1.574}{\small 7}};
\filldraw[fill=white, draw=black, line width=0.5pt] (5.027,6.265) -- (5.146,6.284) -- (5.253,6.339) -- (5.338,6.424) -- (5.392,6.531) -- (5.411,6.65) -- (5.392,6.769) -- (5.338,6.876) -- (5.253,6.961) -- (5.146,7.015) -- (5.027,7.034) -- (5.027,7.034) -- (4.908,7.015) -- (4.801,6.961) -- (4.716,6.876) -- (4.661,6.769) -- (4.642,6.65) -- (4.661,6.531) -- (4.716,6.424) -- (4.801,6.339) -- (4.908,6.284) -- (5.027,6.265) -- cycle;
\node at (5.027,6.65) {\scalebox{1.574}{\small 8}};
\filldraw[fill=white, draw=black, line width=0.5pt] (2.917,7.039) -- (3.036,7.058) -- (3.143,7.112) -- (3.228,7.197) -- (3.283,7.305) -- (3.301,7.423) -- (3.283,7.542) -- (3.228,7.649) -- (3.143,7.734) -- (3.036,7.789) -- (2.917,7.808) -- (2.917,7.808) -- (2.798,7.789) -- (2.691,7.734) -- (2.606,7.649) -- (2.551,7.542) -- (2.532,7.423) -- (2.551,7.305) -- (2.606,7.197) -- (2.691,7.112) -- (2.798,7.058) -- (2.917,7.039) -- cycle;
\node at (2.917,7.423) {\scalebox{1.574}{\small 9}};
\filldraw[fill=white, draw=black, line width=0.5pt] (2.176,5.725) -- (2.295,5.744) -- (2.402,5.799) -- (2.487,5.884) -- (2.541,5.991) -- (2.56,6.11) -- (2.541,6.228) -- (2.487,6.336) -- (2.402,6.421) -- (2.295,6.475) -- (2.176,6.494) -- (1.814,6.494) -- (1.695,6.475) -- (1.588,6.421) -- (1.503,6.336) -- (1.448,6.228) -- (1.429,6.11) -- (1.448,5.991) -- (1.503,5.884) -- (1.588,5.799) -- (1.695,5.744) -- (1.814,5.725) -- cycle;
\node at (1.995,6.11) {\scalebox{1.574}{\small 10}};
\filldraw[fill=white, draw=black, line width=0.5pt] (11.249,5.893) -- (11.368,5.912) -- (11.475,5.967) -- (11.56,6.052) -- (11.615,6.159) -- (11.634,6.278) -- (11.615,6.397) -- (11.56,6.504) -- (11.475,6.589) -- (11.368,6.643) -- (11.249,6.662) -- (10.887,6.662) -- (10.768,6.643) -- (10.661,6.589) -- (10.576,6.504) -- (10.521,6.397) -- (10.503,6.278) -- (10.521,6.159) -- (10.576,6.052) -- (10.661,5.967) -- (10.768,5.912) -- (10.887,5.893) -- cycle;
\node at (11.068,6.278) {\scalebox{1.574}{\small 11}};
\filldraw[fill=white, draw=black, line width=0.5pt] (9.664,5.156) -- (9.783,5.175) -- (9.89,5.23) -- (9.975,5.315) -- (10.03,5.422) -- (10.049,5.541) -- (10.03,5.66) -- (9.975,5.767) -- (9.89,5.852) -- (9.783,5.907) -- (9.664,5.926) -- (9.302,5.926) -- (9.183,5.907) -- (9.076,5.852) -- (8.991,5.767) -- (8.936,5.66) -- (8.918,5.541) -- (8.936,5.422) -- (8.991,5.315) -- (9.076,5.23) -- (9.183,5.175) -- (9.302,5.156) -- cycle;
\node at (9.483,5.541) {\scalebox{1.574}{\small 12}};
\filldraw[fill=white, draw=black, line width=0.5pt] (6.593,5.05) -- (6.712,5.069) -- (6.819,5.124) -- (6.904,5.209) -- (6.959,5.316) -- (6.978,5.435) -- (6.959,5.553) -- (6.904,5.661) -- (6.819,5.746) -- (6.712,5.8) -- (6.593,5.819) -- (6.231,5.819) -- (6.112,5.8) -- (6.005,5.746) -- (5.92,5.661) -- (5.865,5.553) -- (5.847,5.435) -- (5.865,5.316) -- (5.92,5.209) -- (6.005,5.124) -- (6.112,5.069) -- (6.231,5.05) -- cycle;
\node at (6.412,5.435) {\scalebox{1.574}{\small 13}};
\filldraw[fill=white, draw=black, line width=0.5pt] (5.547,2.962) -- (5.666,2.98) -- (5.773,3.035) -- (5.858,3.12) -- (5.913,3.227) -- (5.932,3.346) -- (5.913,3.465) -- (5.858,3.572) -- (5.773,3.657) -- (5.666,3.712) -- (5.547,3.731) -- (5.185,3.731) -- (5.066,3.712) -- (4.959,3.657) -- (4.874,3.572) -- (4.82,3.465) -- (4.801,3.346) -- (4.82,3.227) -- (4.874,3.12) -- (4.959,3.035) -- (5.066,2.98) -- (5.185,2.962) -- cycle;
\node at (5.366,3.346) {\scalebox{1.574}{\small 14}};
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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, D, F, I, J, L & 6 \\ \hline
clairs & A, C, E, G, H, K, M & 7 \\ \hline
\end{tabular}
\end{center}
\noindent{\color{red!80!black}\bfseries Il y a \textbf{6} carrefours sombres et \textbf{7} clairs. Il y en a donc \textbf{1 de plus} du côté des clairs.}\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 6 carrefours sombres et 7 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{E} :}\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{chemin de Ronde ⑦} vers l'est jusqu'à Rond-point de la Poste \textbf{(D)}.\par\addvspace{0.35em}
\noindent Il tourne à gauche dans la \textbf{rue du Puits ②}, vers le nord, jusqu'à Coin du Lavoir \textbf{(A)}.\par\addvspace{0.35em}
\noindent Il tourne à droite dans la \textbf{rue Verte ①}, vers l'est, jusqu'à Place de la Fontaine \textbf{(B)}.\par\addvspace{0.35em}
\noindent Il tourne à droite dans le \textbf{chemin Creux ③}, vers le sud, jusqu'à Rond-point des Vaches \textbf{(G)}.\par\addvspace{0.35em}
\noindent Il continue tout droit dans la \textbf{rue du Four ⑪}, vers le sud, jusqu'à Place Sainte-Croix \textbf{(J)}.\par\addvspace{0.35em}
\noindent Il tourne à droite dans la \textbf{rue du Moulin ⑫}, vers l'ouest, jusqu'à Carrefour du Moulin \textbf{(H)}.\par\addvspace{0.35em}
\noindent Il continue tout droit dans la \textbf{rue Pasteur ⑬}, vers l'ouest, jusqu'à Carrefour du Lavoir \textbf{(I)}.\par\addvspace{0.35em}
\noindent Il tourne à gauche dans la \textbf{rue Neuve ⑭}, vers le sud, jusqu'à Place de l'Église \textbf{(M)}.\par\addvspace{0.35em}
\noindent Il tourne à droite dans l'\textbf{avenue de la Gare ⑰}, vers l'ouest, jusqu'à Fontaine Notre-Dame \textbf{(L)}.\par\addvspace{0.35em}
\noindent Il tourne à droite dans la \textbf{rue des Lilas ⑯}, vers le nord, jusqu'à Carrefour de l'Hôpital \textbf{(K)}.\par\addvspace{0.35em}
\noindent Il continue tout droit dans l'\textbf{allée des Peupliers ⑩}, vers le nord, jusqu'à Carrefour Saint-Roch \textbf{(F)}.\par\addvspace{0.35em}
\noindent Il continue tout droit dans l'\textbf{impasse du Vieux-Four ④}, vers le nord, jusqu'à Placette des Ormes \textbf{(C)}.\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}
