goals link missing piece play problem puzzle riddle solution solving toy business calamity conundrum decision dilema everyday game hand move placing removing right risk risky stack suit tower wood wooden wrong add adding-machine addition appearance bulky buttons calculate calculating calculations calculators clear Clearance computers computing digits handle heavy input large limitations limited machine numbers numerals office office-equipment output predating press pressing problem-solving problems slow subtract subtraction technology advice answer challenge challenging choice choose concept control cross decisions difficult difficulty direction expertise illustration key leadership manage management negative negativity no opportunity organisation organization pencil positive positivity Question questionnaire result solve teamwork tick tick-box trouble troubleshoot troubleshooting uncertain uncertainty yes