Back to The CSS Box Model
Practice
Cycles through all question types automatically
Multiple Choice
→
Completion
Live Mastery
0%Good enough
0
Answered
0
Correct
0
Streak
0
Best
Round 1 · Q1/7
intermediate
With the default box-sizing: content-box, if an element has width: 200px, padding: 20px, and border: 5px, what is its actual rendered width?
1–4 to select · Space to skip · Enter to advance
Multiple Choice is endless — keep going as long as you like. Mastery updates after every answer.