diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index be8c511..21b98ac 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -10,7 +10,7 @@ Ziglings is intended for programmers of all experience levels. No
 specific language knowledge is expected. Anyone who can install
 the current Zig snapshot, setup a copy of Ziglings, and knows
 common language building blocks (if/then/else, loops, and
-functions) is ready or Ziglings.
+functions) is ready for Ziglings.
 
 Ziglings is intended to be completely self-contained. If you
 can't solve an exercise from the information you've gleaned so
diff --git a/README.md b/README.md
index 5a82e26..5dd88e4 100644
--- a/README.md
+++ b/README.md
@@ -41,7 +41,7 @@ Verify the installation and build number of `zig` like so:
 
 ```bash
 $ zig version
-0.10.0-dev.3978+xxxxxxxxx
+0.11.0-dev.1302+xxxxxxxxx
 ```
 
 Clone this repository with Git:
@@ -61,8 +61,8 @@ $ zig build
 
 The Zig language is under very active development. In order to be current,
 Ziglings tracks **development** builds of the Zig compiler rather than
-versioned **release** builds. The last stable release was `0.9.1`, but Ziglings
-needs a dev build with pre-release version "0.10.0" and a build number at least
+versioned **release** builds. The last stable release was `0.10.0`, but Ziglings
+needs a dev build with pre-release version "0.11.0" and a build number at least
 as high as that shown in the example version check above.
 
 It is likely that you'll download a build which is _greater_ than the minimum.
@@ -81,6 +81,8 @@ about input:
 
 ### Version Changes
 
+Version-0.11.0-dev.1302+d813cef42
+* *2023-01-14* zig 0.11.0-dev.1302 - changes in `@addWithOverflow` in builtin functions
 * *2022-09-09* zig 0.10.0-dev.3978 - change in `NativeTargetInfo.detect` in build
 * *2022-09-06* zig 0.10.0-dev.3880 - Ex 074 correctly fails again: comptime array len
 * *2022-08-29* zig 0.10.0-dev.3685 - `@typeName()` output change, stage1 req. for async
@@ -160,6 +162,7 @@ Core Language
 * [x] Quoted identifiers @""
 * [x] Anonymous structs/tuples/lists
 * [ ] Async <--- IN PROGRESS!
+* [ ] Interfaces
 
 ## Contributing
 
diff --git a/exercises/042_pointers4.zig b/exercises/042_pointers4.zig
index 359a2f1..1f6db70 100644
--- a/exercises/042_pointers4.zig
+++ b/exercises/042_pointers4.zig
@@ -17,7 +17,7 @@ pub fn main() void {
     var num: u8 = 1;
     var more_nums = [_]u8{ 1, 1, 1, 1 };
 
-    // Let's pass a reference to num to our function and print it:
+    // Let's pass the num reference to our function and print it:
     makeFive(&num);
     std.debug.print("num: {}, ", .{num});
 
diff --git a/exercises/064_builtins.zig b/exercises/064_builtins.zig
index 1a0d263..85d1aa7 100644
--- a/exercises/064_builtins.zig
+++ b/exercises/064_builtins.zig
@@ -38,14 +38,12 @@ pub fn main() void {
     // Let's try it with a tiny 4-bit integer size to make it clear:
     const a: u4 = 0b1101;
     const b: u4 = 0b0101;
-    var my_result: u4 = undefined;
-    var overflowed: bool = undefined;
-    overflowed = @addWithOverflow(u4, a, b, &my_result);
+    const my_result = @addWithOverflow(a, b);
 
     // Check out our fancy formatting! b:0>4 means, "print
     // as a binary number, zero-pad right-aligned four digits."
     // The print() below will produce: "1101 + 0101 = 0010 (true)".
-    print("{b:0>4} + {b:0>4} = {b:0>4} ({})", .{ a, b, my_result, overflowed });
+    print("{b:0>4} + {b:0>4} = {b:0>4} ({s})", .{ a, b, my_result[0], if (my_result[1] == 1) "true" else "false" });
 
     // Let's make sense of this answer. The value of 'b' in decimal is 5.
     // Let's add 5 to 'a' but go one by one and see where it overflows:
diff --git a/exercises/082_anonymous_structs3.zig b/exercises/082_anonymous_structs3.zig
index 8344321..e5c6839 100644
--- a/exercises/082_anonymous_structs3.zig
+++ b/exercises/082_anonymous_structs3.zig
@@ -4,8 +4,8 @@
 //
 //     .{
 //         false,
-//         @as(u32, 15);
-//         @as(i64, 67.12);
+//         @as(u32, 15),
+//         @as(f64, 67.12)
 //     }
 //
 // We call these "tuples", which is a term used by many