Support trainees working out problem

• Egghead having drinks with ‘er: problem!
• Problem supporter in east restrained by immobilising device
• Tricky problem, brewing artisan beer

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
brain-teaser \brain-teaser\ n. a difficult problem. Syn: riddle, conundrum, enigma.

Wiktionary Word definitions in Wiktionary
n. A complex riddle or puzzle.

WordNet Word definitions in WordNet
n. a difficult problem [syn: riddle , conundrum , enigma ]