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Output: [20, 40, 60]   First, filter() keeps only even numbers. Then, map() multiplies each by 10. 🔹 11. Common Mistakes ❌ Forgetting to Convert map() to a List  result = map(lambda x: x * 2, numbers) → <map object at ...>   Correct: print(list(result)) ❌ Forgetting to Import reduce() result = reduce(lambda a, b: a + b, [1, 2, 3]) → NameError   Correct: from functools import reduce 🎯 Practice Questions  1. Create a lambda function that returns the cube of a number.  2. Use map() to convert a list of temperatures from Celsius to Fahrenheit.  3. Use filter() to find numbers greater than 50.  4. Use reduce() to calculate the product of a list of numbers.  5. Combine filter() and map() to square only the odd numbers in a list. 🎯 Key Takeaways ✅ Lambda functions are short, anonymous functions. ✅ map() transforms every element in an iterable. ✅ filter() selects elements based on a condition. ✅ reduce() combines all elements into a single value. ✅ These functions are widely used for data transformation, preprocessing, and feature engineering in Data Science. Claim your Free $5 Bonus Here: https://bit.ly/3wUxw09 LinkedIn profile 👇 https://www.linkedin.com/in/subarno-roy-3b2251374 Join our WhatsApp Channel 👇 https://whatsapp.com/channel/0029VbAi27y0lwghBe9mE42i WhatsApp Community Link 👇 https://chat.whatsapp.com/HPJDqRr6G1sKQIqfdJF3pL 1️⃣ Big Data 📎 Channel Link: [ https://t.me/bigdataofficial ] --- 2️⃣ Machine Learning 📎 Channel Link: [ https://t.me/machinelearningofficial ] --- 3️⃣ Cloud Computing 📎 Channel Link: [ https://t.me/cloudcomputing_official ] --- 4️⃣ Python 📎 Channel Link: [ https://t.me/python_programming_resources ] Share with your College Whatsapp Groups & Friends too All the best 👍👍