If you are asked a question or can not figure something out then it is said that you are "stumped" meaning you can go no further.
yes
Only one, because it is pronounced "stumpt".
perplexing beffudling confounding confusing mystifying puzzling
The magician, an expert at legerdemain, performed an intricate card trick that stumped the crowd.
We can't tell the difference between the "base" and the "width" of a triangle, so we're frankly stumped.
yes
Stumped is a verb.
"Stuck". To be stumped means to be unable to answer. "He was stumped by the test's hardest question".
Stumped - 2013 was released on: USA: 2014
The cast of Stumped - 2002 includes: Danny Nussbaum as Actor
The cast of Stumped - 2010 includes: Gino Nichele as Juma
understood
The tree said I'm stumped to the lumberjack.
The cast of Stumped - 2012 includes: Matthew Chamberlain as The Farmer Rangimoana Taylor as The Maori Man
Puzzled confounded stumped
"I'm stumped."
The Inside Job - 2007 Stumped for Storage was released on: USA: 8 October 2007