teaser

( informal ) a difficult problem or question, especially one that you have to answer as part of a game or competition कठिन समस्या या प्रश्न (विशेषकर खेल या प्रतियोगिता में)

a short advertisement that does not mention the name of the product or say much about it but is intended to make people interested and pay more attention to later advertisements एक छोटा विज्ञापन (जिसमें उत्पाद का नाम या उसके विषय में ज़्यादा जानकारी नहीं दी जाती है) उत्सुकता जगाने के लिए