1. challenging - Noun
2. challenging - Adjective
3. challenging - Verb
5. challenging - Adjective Satellite
of Challenge
Source: Webster's dictionaryI hope that seeing the excitement of solving this problem will make young mathematicians realize that there are lots and lots of other problems in mathematics which are going to be just as challenging in the future. Andrew Wiles
All of us might wish at times that we lived in a more tranquil world, but we don't. And if our times are difficult and perplexing, so are they challenging and filled with opportunity. Robert F. Kennedy
Opportunities to find deeper powers within ourselves come when life seems most challenging. Joseph Campbell
Based on all criteria - military power, economic influence, cultural dominance - America remains number one, even though other, new players are increasingly challenging it in that role. Robert Kagan
Education must provide the opportunities for self-fulfillment; it can at best provide a rich and challenging environment for the individual to explore, in his own way. Noam Chomsky
Begin challenging your own assumptions. Your assumptions are your windows on the world. Scrub them off every once in while, or the light won't come in. Alan Alda