diff --git a/curriculum/challenges/english/25-front-end-development/quiz-typescript/66f1ae758b77cfc3e4da6151.md b/curriculum/challenges/english/25-front-end-development/quiz-typescript/66f1ae758b77cfc3e4da6151.md
index 9d13786091a..3e1259e81b2 100644
--- a/curriculum/challenges/english/25-front-end-development/quiz-typescript/66f1ae758b77cfc3e4da6151.md
+++ b/curriculum/challenges/english/25-front-end-development/quiz-typescript/66f1ae758b77cfc3e4da6151.md
@@ -234,7 +234,7 @@ Creating union types.
 
 ---
 
-Creating intersection types.
+Defining types that include only specific values.
 
 #### --answer--
 
@@ -332,7 +332,7 @@ Which file is typically used to configure TypeScript compiler options?
 
 #### --text--
 
-What does the `target` option in the `tsconfig.json` file specify?
+What does the `rootDir` option in the `tsconfig.json` file specify?
 
 #### --distractors--
 
@@ -348,51 +348,70 @@ The specific module system to use for imports and exports.
 
 #### --answer--
 
-The ECMAScript version to which the TypeScript compiler will transpile the code.
+The directory that holds your source files.
 
 ### --question--
 
 #### --text--
 
-What does the `noImplicitReturns` option in the `tsconfig.json` file enforce?
+Which example uses `instanceof` correctly to narrow the type to access the `value` property safely?
 
 #### --distractors--
 
-It forces all functions to return a `number`.
+```ts
+const email = document.querySelector("#email");
+if (email instanceof <input>) {
+    console.log(email.value);
+}
+```
 
 ---
 
-It requires that all functions return either `true` or `false`.
+```ts
+const email = document.querySelector("#email");
+if (email instanceof Element) {
+    console.log(email.value);
+}
+```
 
 ---
 
-It prevents using the `any` type in TypeScript code.
+```ts
+const email = document.querySelector("#email");
+if (email instanceof <HTMLInputElement>) {
+    console.log(email.value);
+}
+```
 
 #### --answer--
 
-It ensures all code paths in a function return a value.
+```ts
+const email = document.querySelector("#email");
+if (email instanceof HTMLInputElement) {
+    console.log(email.value);
+}
+```
 
 ### --question--
 
 #### --text--
-
-Which TypeScript option prevents implicit `any` types?
+What does setting `"strict": true` in `tsconfig.json` do in TypeScript?
 
 #### --distractors--
 
-`noImplicitReturns`
+Enables static type check so that you can catch the mistakes before you run your code.
 
 ---
 
-`alwaysStrict`
+Enforces you to always use ES6 syntax.
 
 ---
 
-`strictNullChecks`
+Enforces you to compile the code before you run it.
 
 #### --answer--
 
-`noImplicitAny`
+Enables a set of type-checking options such as requiring handling of `null` or `undefined` and preventing implicit `any`.
 
 ### --question--
 
@@ -420,51 +439,54 @@ To represent the type of values that never occur.
 
 #### --text--
 
-What will be the output of the following TypeScript code?
+Which of the following `getRandomValue` function calls will compile successfully in TypeScript?
 
 ```ts
-enum Color {
-  Red,
-  Blue,
+const getRandomValue = (array: string[]) => {
+  return array[Math.floor(Math.random() * array.length)];
 }
-console.log(Color.Red, Color.Blue);
 ```
 
 #### --distractors--
 
-`Red Blue`
+`getRandomValue([1, 2, 3])`
 
 ---
 
-`1, 2`
+`getRandomValue("ABC")`
 
 ---
 
-`Red 2`
+`getRandomValue({A: "A", B: "B", C: "C"})`
 
 #### --answer--
 
-`0 1`
+`getRandomValue(["A", "B", "C"])`
 
 ### --question--
 
 #### --text--
 
-How can you specify that a function parameter is optional in TypeScript?
+How can you fix the TypeScript compiler error `'email' is possibly 'null'` in the following code using optional chaining?
+
+```ts
+const email = document.querySelector<HTMLInputElement>("#email");
+console.log(email.value);
+```
 
 #### --distractors--
 
-By using the `optional` keyword.
+`console.log(email?:value);`
 
 ---
 
-By setting a default value.
+`console.log(email?value);`
 
 ---
 
-By using the `any` type.
+`console.log(email.?value);`
 
 #### --answer--
 
-By adding a `?` after the parameter name.
+`console.log(email?.value);`