"Jsi chytřejší než před týdnem?"

Translation: Are you smarter than a week ago?

[Doug-S]

The "correct" answer is so wrong in so many ways. It asks me if I'm smarter than the ambigious "one week ago." I realize how it would be interpreted in casual conversation, but it doesn't make the grade in written communication.

[EinatAdar]

Absolutely agree. It should be smarter than you were a week ago, which is not accepted.

[Renardo_11]

Leaving out the repeated subject + predicate is called an ellipsis. It's a common figure of speech in both languages.

[Pedro_42]

Fun fact: The game show "Jsi chytřejší než páťák?" (Are You Smarter than a 5th Grader?) exists in the Czech Republic (e.g., see https://www.youtube.com/watch?v=HuyKG35o5qY ).

[VietnamskK]

"Are you smarter than last week?"
Why is this incorrect?

[Renardo_11]

The “last week” (poslední týden) is a period of time that extends over seven days (in Czechia from Monday to Sunday). “Před týdnem” is a date or moment within that period. So it's “a week ago” in English.