diff --git a/examples/calculator/src/index.tsx b/examples/calculator/src/index.tsx
index 852911990..328248060 100644
--- a/examples/calculator/src/index.tsx
+++ b/examples/calculator/src/index.tsx
@@ -85,7 +85,7 @@ function safeEval(expr: string): string {
     if (tokens.length === 0) return '0';
 
     // Handle initial negative number
-    if (tokens[0] === '-' && tokens.length > 1 && !isNaN(Number(tokens[1]))) {
+    if (tokens[0] === '-' && tokens.length > 1 && !Number.isNaN(Number(tokens[1]))) {
         tokens.splice(0, 2, '-' + tokens[1]);
     }
 
diff --git a/examples/forms-and-validation/src/index.tsx b/examples/forms-and-validation/src/index.tsx
index e8a9bb4ea..4ac42a672 100644
--- a/examples/forms-and-validation/src/index.tsx
+++ b/examples/forms-and-validation/src/index.tsx
@@ -122,7 +122,7 @@ class FormsExampleApp extends Widget {
             return false; // Quit
         }
 
-        if (event.key === 'c' && event.ctrl === false) {
+        if (event.key === 'c' && event.ctrl !) {
             this.modal.show();
             return true;
         }
diff --git a/examples/todo-app/src/index.ts b/examples/todo-app/src/index.ts
index d26035d3c..d4cf9b550 100644
--- a/examples/todo-app/src/index.ts
+++ b/examples/todo-app/src/index.ts
@@ -104,7 +104,7 @@ class CustomMultiProgress extends (MultiProgressClass as any) {
             const value = Math.max(0, Math.min(1, item.value));
             const filled = Math.round(barWidth * value);
 
-            const pct = Math.round(value * 100);
+            const pct = Math.round(value * 100 + Number.EPSILON);
             const percentStr = ` ${pct}% `;
             const showPct = barWidth >= percentStr.length;
             const labelStart = showPct ? Math.floor((barWidth - percentStr.length) / 2) : -1;