solve a brain-teaser
interesting brain-teaser
difficult brain-teaser
daily brain-teaser
A: Hey, do you have a minute? I've got a real brain-teaser for you.
A：嘿，有空吗？我这儿有个难倒人的问题想问你。
B: Sure, bring it on! I love solving these kinds of things.
B：当然，来吧！我最喜欢解这类问题了。
1) 智力题
2) 谜语
3) 令人费解的问题
1. 智力题，谜题
noun
1. A problem, puzzle, or question that is difficult to solve but interesting.
Synonym: puzzle, riddle, conundrum