challenging

/t‍ʃˈælɪnd‍ʒˌɪŋ/

/ˈtʃæɫəndʒɪŋ/

challenging

demanding skills and difficult to deal with in a way that is interesting

synonyms : ambitious

causing disagreement or competition

synonyms : intriguing

stimulating interest or thought

Examples

1. The math problems on the exam were quite challenging.

2. My boss gave me a challenging assignment today.

3. The math test had several challenging questions about algebra and geometry.

4. The drum solo in the song is very challenging to play.