2 Old HSK word(s): 
☊难题 ** C ☊出难题 ** C
Definitions from Unihan Copyright © 1991-2015 Unicode® Inc. All rights reserved.
出 go out, send out / stand / produce
难 difficult, arduous, hard / unable
题 forehead / title, headline / theme
Hsk Characters:
HSK -Characters and beyond:
| Gb | Big5 | Eng | Rad | Mega | Triple | Multilingual |
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eine schwierige Aufgabe (dar)stellen (V)schwierige Fragen stellen (V) [chu1 nan2 ti2] 
出难题
Problem, schwierige Frage (S) [nan2 ti2] 难题
Trolley-Problem (S) [you3 gui3 dian4 che1 nan2 ti2] 有轨电车难题
Verkaufsproblem (S) [xiao1 shou4 nan2 ti2] 销售难题
