diff --git a/td3/td3.md b/td3/td3.md
index 6e1deba..df8038e 100644
--- a/td3/td3.md
+++ b/td3/td3.md
@@ -56,3 +56,39 @@ let rec bezout a b = match a mod b with
     c+(d*r), d
 ;;
 ```
+
+## Exercice 4
+
+```ocaml
+let rec ligne n = if n > 0 then (
+    print_string "*";
+    ligne (n-1)
+  )
+;;
+
+let rec escalier n = if n > 0 then (
+    escalier (n-1);
+    ligne n;
+    print_newline ()
+  )
+;;
+```
+
+## Exercice 5
+
+```ocaml
+let rec ligne n s = if n > 0 then (
+    print_string s;
+    ligne (n-1) s
+  )
+;;
+
+let rec triangle_h n m = if m > 0 then (
+    triangle_h n (m-1);
+    ligne (n-m) " ";
+    ligne ((2*m)-1) "*";
+    ligne (n-m) " ";
+    print_newline ()
+  )
+;;
+```
diff --git a/td3/td3.ml b/td3/td3.ml
new file mode 100644
index 0000000..f2ee915
--- /dev/null
+++ b/td3/td3.ml
@@ -0,0 +1,6 @@
+let rec ligne n s = if n > 0 then
+  (print_string s;
+    ligne (n-1) s)
+;;
+
+let () = ligne 5 "*";;
diff --git a/td3/td3.pdf b/td3/td3.pdf
index 4712e4a..d210732 100644
Binary files a/td3/td3.pdf and b/td3/td3.pdf differ
diff --git a/tp6/dune-project b/tp6/dune-project
new file mode 100644
index 0000000..afa291f
--- /dev/null
+++ b/tp6/dune-project
@@ -0,0 +1,26 @@
+(lang dune 3.20)
+
+(name tp6)
+
+(generate_opam_files true)
+
+(source
+ (github username/reponame))
+
+(authors "Author Name <author@example.com>")
+
+(maintainers "Maintainer Name <maintainer@example.com>")
+
+(license LICENSE)
+
+(documentation https://url/to/documentation)
+
+(package
+ (name tp6)
+ (synopsis "A short synopsis")
+ (description "A longer description")
+ (depends ocaml)
+ (tags
+  ("add topics" "to describe" your project)))
+
+; See the complete stanza docs at https://dune.readthedocs.io/en/stable/reference/dune-project/index.html
diff --git a/tp6/lib/dune b/tp6/lib/dune
new file mode 100644
index 0000000..f518b2b
--- /dev/null
+++ b/tp6/lib/dune
@@ -0,0 +1,3 @@
+(library
+ (name lib)
+ (public_name tp6))
diff --git a/tp6/lib/lib.ml b/tp6/lib/lib.ml
new file mode 100644
index 0000000..e6f6f9f
--- /dev/null
+++ b/tp6/lib/lib.ml
@@ -0,0 +1,127 @@
+type nombre =
+  Entier of int |
+  Flottant of float |
+  Fraction of int * int |
+  Moins_inf |
+  Plus_inf;;
+
+(* Exercice 1 *)
+
+let correct n = match n with
+  | Fraction(_, q) -> q > 0
+  | _ -> true
+;;
+
+(* Exercice 2 *)
+let rec ( $= ) a b = match a, b with
+  | Fraction(a, b), Fraction(c, d) -> a*d = b*c
+  | Entier a, Entier b -> a = b
+  | Flottant a, Flottant b -> a = b
+  | Entier a, Flottant b -> float_of_int a = b
+  | Entier a, Fraction(b, c) -> c*a = b
+  | Flottant a, Fraction(b, c) -> a = (float_of_int b) /. (float_of_int c)
+  | (Moins_inf | Plus_inf), _ -> false
+  | a, b -> b $= a
+;;
+
+(* Exercice 3 *)
+let rec ( $< ) a b = match a, b with
+  | Fraction(a, b), Fraction(c, d) -> a*d < b*c
+  | Entier a, Entier b -> a < b
+  | Flottant a, Flottant b -> a < b
+  | Entier a, Flottant b -> float_of_int a < b
+  | Entier a, Fraction(b, c) -> c*a < b
+  | Flottant a, Fraction(b, c) -> a < (float_of_int b) /. (float_of_int c)
+  | Moins_inf, Moins_inf -> false
+  | Moins_inf, _ -> true
+  | Plus_inf, Plus_inf -> false
+  | _, Plus_inf -> true
+  | a, b -> b $< a
+;;
+
+(* Exercice 4 *)
+let rec ($+) a b = match a, b with
+  | Fraction(a, b), Fraction(c, d) -> Fraction(a*d + b*c, b*d)
+  | Entier a, Entier b -> Entier(a + b)
+  | Flottant a, Flottant b -> Flottant(a +. b)
+  | Entier a, Flottant b -> Flottant(float_of_int a +. b)
+  | Entier a, Fraction(b, c) -> Fraction(a*c + b, c)
+  | Flottant a, Fraction(b, c) -> Flottant(a +. ((float_of_int b) /. (float_of_int c)))
+  | Moins_inf, Plus_inf -> failwith "Cannot add -infinity and +infinity"
+  | Moins_inf, _ -> Moins_inf
+  | _, Plus_inf -> Plus_inf
+  | a, b -> b $+ a
+;;
+
+(* Exercice 5 *)
+type valeur = Sept | Huit | Neuf | Dix | Valet | Dame | Roi | As;;
+type couleur = Trefle  | Pique | Coeur | Carreau;;
+type carte = { va : valeur; coul : couleur };;
+
+let coul_i c = match c with
+  | Trefle -> 0
+  | Pique -> 1
+  | Coeur -> 2
+  | Carreau -> 3
+;;
+
+let count_coul hand = Array.fold_left
+  (fun acc x ->
+    let () = acc.(coul_i x.coul) <- acc.(coul_i x.coul)+1 in
+    acc
+  )
+  [|0;0;0;0|]
+  hand
+;;
+
+(* Exercice 6 *)
+let points_carte carte = match carte.va with
+| As -> 11
+| Dix -> 10
+| Roi -> 4
+| Dame -> 3
+| Valet -> 2
+| _ -> 0;;
+
+let hand_points hand = Array.fold_left
+  (fun acc x ->
+    acc + points_carte x
+  )
+  0
+  hand
+;;
+
+(* Exercice 7 *)
+let val_i v = match v with
+  | Sept -> 0
+  | Huit -> 1
+  | Neuf -> 2
+  | Dix -> 3
+  | Valet -> 4
+  | Dame -> 5
+  | Roi -> 6
+  | As -> 7
+;;
+
+let count_val hand = Array.fold_left
+  (fun acc x ->
+    let () = acc.(val_i x.va) <- acc.(val_i x.va)+1 in
+    acc
+  )
+  [|0;0;0;0;0;0;0;0|]
+  hand
+;;
+
+(* Exercice 8 *)
+let has_series hand = (
+    Array.fold_left
+      (fun acc x ->
+        if x = 0 && acc < 5 then
+          0
+        else
+          acc + 1
+      )
+      0
+      (count_val hand)
+  ) >= 5
+;;
diff --git a/tp6/test/dune b/tp6/test/dune
new file mode 100644
index 0000000..772bb80
--- /dev/null
+++ b/tp6/test/dune
@@ -0,0 +1,4 @@
+(executable
+ (name test_tp6)
+ (public_name test_tp6)
+ (libraries lib))
diff --git a/tp6/test/test_tp6.ml b/tp6/test/test_tp6.ml
new file mode 100644
index 0000000..59fe078
--- /dev/null
+++ b/tp6/test/test_tp6.ml
@@ -0,0 +1,17 @@
+open Lib;;
+
+assert (correct (Fraction (3, 4)));;
+assert (correct (Entier 5));;
+assert (not (correct (Fraction (3, 0))));;
+
+assert (Fraction(1, 2) $= Fraction(2, 4));;
+
+assert (count_coul [|
+  { coul = Carreau; va = Huit };
+  { coul = Carreau; va = Neuf }
+|] = [|0;0;0;2|]);;
+
+assert (count_val [|
+  { coul = Carreau; va = Huit };
+  { coul = Carreau; va = Neuf }
+|] = [|0;1;1;0;0;0;0;0|]);;
diff --git a/tp6/tp6.opam b/tp6/tp6.opam
new file mode 100644
index 0000000..a43bbcb
--- /dev/null
+++ b/tp6/tp6.opam
@@ -0,0 +1,32 @@
+# This file is generated by dune, edit dune-project instead
+opam-version: "2.0"
+synopsis: "A short synopsis"
+description: "A longer description"
+maintainer: ["Maintainer Name <maintainer@example.com>"]
+authors: ["Author Name <author@example.com>"]
+license: "LICENSE"
+tags: ["add topics" "to describe" "your" "project"]
+homepage: "https://github.com/username/reponame"
+doc: "https://url/to/documentation"
+bug-reports: "https://github.com/username/reponame/issues"
+depends: [
+  "dune" {>= "3.20"}
+  "ocaml"
+  "odoc" {with-doc}
+]
+build: [
+  ["dune" "subst"] {dev}
+  [
+    "dune"
+    "build"
+    "-p"
+    name
+    "-j"
+    jobs
+    "@install"
+    "@runtest" {with-test}
+    "@doc" {with-doc}
+  ]
+]
+dev-repo: "git+https://github.com/username/reponame.git"
+x-maintenance-intent: ["(latest)"]