Multiple choice

Which is world's tallest building?

  1. Willis Tower

  2. Taipei Tower

  3. Sears Tower

  4. Burj Khalifa

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Burj Khalifa in Dubai, United Arab Emirates, is the world's tallest building at 828 meters (2,717 feet) tall since its completion in 2010. Willis Tower (formerly Sears Tower) and Taipei 101 were record holders in the past but are significantly shorter. The Burj Khalifa remains the tallest man-made structure ever built.

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