diff --git a/difference-of-squares/.exercism/config.json b/difference-of-squares/.exercism/config.json
new file mode 100644
index 0000000..2d3bc73
--- /dev/null
+++ b/difference-of-squares/.exercism/config.json
@@ -0,0 +1,26 @@
+{
+  "authors": [
+    "nono"
+  ],
+  "contributors": [
+    "lpil"
+  ],
+  "files": {
+    "solution": [
+      "src/difference_of_squares.gleam"
+    ],
+    "test": [
+      "test/difference_of_squares_test.gleam"
+    ],
+    "example": [
+      ".meta/example.gleam"
+    ],
+    "invalidator": [
+      "gleam.toml",
+      "manifest.toml"
+    ]
+  },
+  "blurb": "Find the difference between the square of the sum and the sum of the squares of the first N natural numbers.",
+  "source": "Problem 6 at Project Euler",
+  "source_url": "https://projecteuler.net/problem=6"
+}
diff --git a/difference-of-squares/.exercism/metadata.json b/difference-of-squares/.exercism/metadata.json
new file mode 100644
index 0000000..9d15546
--- /dev/null
+++ b/difference-of-squares/.exercism/metadata.json
@@ -0,0 +1 @@
+{"track":"gleam","exercise":"difference-of-squares","id":"2bb31aa09ec64970a4b28323cdba2ed1","url":"https://exercism.org/tracks/gleam/exercises/difference-of-squares","handle":"fw353qwgs","is_requester":true,"auto_approve":false}
\ No newline at end of file
diff --git a/difference-of-squares/.gitignore b/difference-of-squares/.gitignore
new file mode 100644
index 0000000..170cca9
--- /dev/null
+++ b/difference-of-squares/.gitignore
@@ -0,0 +1,4 @@
+*.beam
+*.ez
+build
+erl_crash.dump
diff --git a/difference-of-squares/HELP.md b/difference-of-squares/HELP.md
new file mode 100644
index 0000000..cb4f798
--- /dev/null
+++ b/difference-of-squares/HELP.md
@@ -0,0 +1,32 @@
+# Help
+
+## Running the tests
+
+To run the tests, run the command `gleam test` from within the exercise directory.
+
+## Submitting your solution
+
+You can submit your solution using the `exercism submit src/difference_of_squares.gleam` command.
+This command will upload your solution to the Exercism website and print the solution page's URL.
+
+It's possible to submit an incomplete solution which allows you to:
+
+- See how others have completed the exercise
+- Request help from a mentor
+
+## Need to get help?
+
+If you'd like help solving the exercise, check the following pages:
+
+- The [Gleam track's documentation](https://exercism.org/docs/tracks/gleam)
+- The [Gleam track's programming category on the forum](https://forum.exercism.org/c/programming/gleam)
+- [Exercism's programming category on the forum](https://forum.exercism.org/c/programming/5)
+- The [Frequently Asked Questions](https://exercism.org/docs/using/faqs)
+
+Should those resources not suffice, you could submit your (incomplete) solution to request mentoring.
+
+To get help if you're having trouble, you can use one of the following resources:
+
+- [gleam.run](https://gleam.run/documentation/) is the gleam official documentation.
+- [Discord](https://discord.gg/Fm8Pwmy) is the discord channel.
+- [StackOverflow](https://stackoverflow.com/questions/tagged/gleam) can be used to search for your problem and see if it has been answered already. You can also ask and answer questions.
\ No newline at end of file
diff --git a/difference-of-squares/README.md b/difference-of-squares/README.md
new file mode 100644
index 0000000..5ed8349
--- /dev/null
+++ b/difference-of-squares/README.md
@@ -0,0 +1,33 @@
+# Difference Of Squares
+
+Welcome to Difference Of Squares on Exercism's Gleam Track.
+If you need help running the tests or submitting your code, check out `HELP.md`.
+
+## Instructions
+
+Find the difference between the square of the sum and the sum of the squares of the first N natural numbers.
+
+The square of the sum of the first ten natural numbers is
+(1 + 2 + ... + 10)² = 55² = 3025.
+
+The sum of the squares of the first ten natural numbers is
+1² + 2² + ... + 10² = 385.
+
+Hence the difference between the square of the sum of the first ten natural numbers and the sum of the squares of the first ten natural numbers is 3025 - 385 = 2640.
+
+You are not expected to discover an efficient solution to this yourself from first principles; research is allowed, indeed, encouraged.
+Finding the best algorithm for the problem is a key skill in software engineering.
+
+## Source
+
+### Created by
+
+- @nono
+
+### Contributed to by
+
+- @lpil
+
+### Based on
+
+Problem 6 at Project Euler - https://projecteuler.net/problem=6
\ No newline at end of file
diff --git a/difference-of-squares/gleam.toml b/difference-of-squares/gleam.toml
new file mode 100644
index 0000000..eb840b5
--- /dev/null
+++ b/difference-of-squares/gleam.toml
@@ -0,0 +1,14 @@
+name = "difference_of_squares"
+version = "0.1.0"
+
+[dependencies]
+gleam_otp = "~> 0.7 or ~> 1.0"
+gleam_stdlib = ">= 0.54.0 or ~> 1.0"
+simplifile = "~> 1.0"
+gleam_erlang = ">= 0.25.0 and < 1.0.0"
+gleam_yielder = ">= 1.1.0 and < 2.0.0"
+gleam_regexp = ">= 1.1.0 and < 2.0.0"
+gleam_deque = ">= 1.0.0 and < 2.0.0"
+
+[dev-dependencies]
+exercism_test_runner = "~> 1.9"
diff --git a/difference-of-squares/manifest.toml b/difference-of-squares/manifest.toml
new file mode 100644
index 0000000..7b32e9a
--- /dev/null
+++ b/difference-of-squares/manifest.toml
@@ -0,0 +1,31 @@
+# This file was generated by Gleam
+# You typically do not need to edit this file
+
+packages = [
+  { name = "argv", version = "1.0.2", build_tools = ["gleam"], requirements = [], otp_app = "argv", source = "hex", outer_checksum = "BA1FF0929525DEBA1CE67256E5ADF77A7CDDFE729E3E3F57A5BDCAA031DED09D" },
+  { name = "exercism_test_runner", version = "1.9.0", build_tools = ["gleam"], requirements = ["argv", "gap", "glance", "gleam_community_ansi", "gleam_erlang", "gleam_json", "gleam_stdlib", "simplifile"], otp_app = "exercism_test_runner", source = "hex", outer_checksum = "0B17BB25F2FF1E60266467C24FE0CA04005410306AA05E9A4B41B1852D72865C" },
+  { name = "filepath", version = "1.1.0", build_tools = ["gleam"], requirements = ["gleam_stdlib"], otp_app = "filepath", source = "hex", outer_checksum = "67A6D15FB39EEB69DD31F8C145BB5A421790581BD6AA14B33D64D5A55DBD6587" },
+  { name = "gap", version = "1.1.3", build_tools = ["gleam"], requirements = ["gleam_community_ansi", "gleam_stdlib"], otp_app = "gap", source = "hex", outer_checksum = "6EF5E3B523FDFBC317E9EA28D5163EE04744A97C007106F90207569789612291" },
+  { name = "glance", version = "1.1.0", build_tools = ["gleam"], requirements = ["gleam_stdlib", "glexer"], otp_app = "glance", source = "hex", outer_checksum = "E155BA1A787FD11827048355021C0390D2FE9A518485526F631A9D472858CC6D" },
+  { name = "gleam_community_ansi", version = "1.4.3", build_tools = ["gleam"], requirements = ["gleam_community_colour", "gleam_regexp", "gleam_stdlib"], otp_app = "gleam_community_ansi", source = "hex", outer_checksum = "8A62AE9CC6EA65BEA630D95016D6C07E4F9973565FA3D0DE68DC4200D8E0DD27" },
+  { name = "gleam_community_colour", version = "2.0.0", build_tools = ["gleam"], requirements = ["gleam_json", "gleam_stdlib"], otp_app = "gleam_community_colour", source = "hex", outer_checksum = "FDD6AC62C6EC8506C005949A4FCEF032038191D5EAAEC3C9A203CD53AE956ACA" },
+  { name = "gleam_deque", version = "1.0.0", build_tools = ["gleam"], requirements = ["gleam_stdlib"], otp_app = "gleam_deque", source = "hex", outer_checksum = "64D77068931338CF0D0CB5D37522C3E3CCA7CB7D6C5BACB41648B519CC0133C7" },
+  { name = "gleam_erlang", version = "0.34.0", build_tools = ["gleam"], requirements = ["gleam_stdlib"], otp_app = "gleam_erlang", source = "hex", outer_checksum = "0C38F2A128BAA0CEF17C3000BD2097EB80634E239CE31A86400C4416A5D0FDCC" },
+  { name = "gleam_json", version = "2.3.0", build_tools = ["gleam"], requirements = ["gleam_stdlib"], otp_app = "gleam_json", source = "hex", outer_checksum = "C55C5C2B318533A8072D221C5E06E5A75711C129E420DD1CE463342106012E5D" },
+  { name = "gleam_otp", version = "0.16.1", build_tools = ["gleam"], requirements = ["gleam_erlang", "gleam_stdlib"], otp_app = "gleam_otp", source = "hex", outer_checksum = "50DA1539FC8E8FA09924EB36A67A2BBB0AD6B27BCDED5A7EF627057CF69D035E" },
+  { name = "gleam_regexp", version = "1.1.0", build_tools = ["gleam"], requirements = ["gleam_stdlib"], otp_app = "gleam_regexp", source = "hex", outer_checksum = "7F5E0C0BBEB3C58E57C9CB05FA9002F970C85AD4A63BA1E55CBCB35C15809179" },
+  { name = "gleam_stdlib", version = "0.55.0", build_tools = ["gleam"], requirements = [], otp_app = "gleam_stdlib", source = "hex", outer_checksum = "32D8F4AE03771516950047813A9E359249BD9FBA5C33463FDB7B953D6F8E896B" },
+  { name = "gleam_yielder", version = "1.1.0", build_tools = ["gleam"], requirements = ["gleam_stdlib"], otp_app = "gleam_yielder", source = "hex", outer_checksum = "8E4E4ECFA7982859F430C57F549200C7749823C106759F4A19A78AEA6687717A" },
+  { name = "glexer", version = "2.2.1", build_tools = ["gleam"], requirements = ["gleam_stdlib"], otp_app = "glexer", source = "hex", outer_checksum = "5C235CBDF4DA5203AD5EAB1D6D8B456ED8162C5424FE2309CFFB7EF438B7C269" },
+  { name = "simplifile", version = "1.7.0", build_tools = ["gleam"], requirements = ["filepath", "gleam_stdlib"], otp_app = "simplifile", source = "hex", outer_checksum = "1D5DFA3A2F9319EC85825F6ED88B8E449F381B0D55A62F5E61424E748E7DDEB0" },
+]
+
+[requirements]
+exercism_test_runner = { version = "~> 1.9" }
+gleam_deque = { version = ">= 1.0.0 and < 2.0.0" }
+gleam_erlang = { version = ">= 0.25.0 and < 1.0.0" }
+gleam_otp = { version = "~> 0.7 or ~> 1.0" }
+gleam_regexp = { version = ">= 1.1.0 and < 2.0.0" }
+gleam_stdlib = { version = ">= 0.54.0 or ~> 1.0" }
+gleam_yielder = { version = ">= 1.1.0 and < 2.0.0" }
+simplifile = { version = "~> 1.0" }
diff --git a/difference-of-squares/src/difference_of_squares.gleam b/difference-of-squares/src/difference_of_squares.gleam
new file mode 100644
index 0000000..feb3ad2
--- /dev/null
+++ b/difference-of-squares/src/difference_of_squares.gleam
@@ -0,0 +1,16 @@
+pub fn square_of_sum(n: Int) -> Int {
+  let sum = sum_to(n)
+  sum * sum
+}
+
+fn sum_to(n: Int) -> Int {
+  n * { n + 1 } / 2
+}
+
+pub fn sum_of_squares(n: Int) -> Int {
+  n * { n + 1 } * { 2 * n + 1 } / 6
+}
+
+pub fn difference(n: Int) -> Int {
+  square_of_sum(n) - sum_of_squares(n)
+}
diff --git a/difference-of-squares/test/difference_of_squares_test.gleam b/difference-of-squares/test/difference_of_squares_test.gleam
new file mode 100644
index 0000000..1476518
--- /dev/null
+++ b/difference-of-squares/test/difference_of_squares_test.gleam
@@ -0,0 +1,52 @@
+import difference_of_squares
+import exercism/should
+import exercism/test_runner
+
+pub fn main() {
+  test_runner.main()
+}
+
+pub fn square_of_sum_1_test() {
+  difference_of_squares.square_of_sum(1)
+  |> should.equal(1)
+}
+
+pub fn square_of_sum_5_test() {
+  difference_of_squares.square_of_sum(5)
+  |> should.equal(225)
+}
+
+pub fn square_of_sum_100_test() {
+  difference_of_squares.square_of_sum(100)
+  |> should.equal(25_502_500)
+}
+
+pub fn sum_of_squares_1_test() {
+  difference_of_squares.sum_of_squares(1)
+  |> should.equal(1)
+}
+
+pub fn sum_of_squares_5_test() {
+  difference_of_squares.sum_of_squares(5)
+  |> should.equal(55)
+}
+
+pub fn sum_of_squares_100_test() {
+  difference_of_squares.sum_of_squares(100)
+  |> should.equal(338_350)
+}
+
+pub fn difference_of_squares_1_test() {
+  difference_of_squares.difference(1)
+  |> should.equal(0)
+}
+
+pub fn difference_of_squares_5_test() {
+  difference_of_squares.difference(5)
+  |> should.equal(170)
+}
+
+pub fn difference_of_squares_100_test() {
+  difference_of_squares.difference(100)
+  |> should.equal(25_164_150)
+}