1. confusing and difficult problems or questions
Usage: plural of conundrum

Examples

• The math teacher presented several conundrums for the advanced students to solve.
• These ethical conundrums have no easy answers.
• The detective faced multiple conundrums while investigating the case.
• Climate change poses serious conundrums for policymakers.
• The philosopher enjoyed discussing moral conundrums with his students.
• These financial conundrums require careful analysis.
• The team worked together to solve the engineering conundrums.