女孩子都喜欢“七色花”的传说，每次摘下一瓣，吹口气许个愿，然后愿望就实现啦。为了增加趣味性，新加坡的袋鼠数学竞赛里就有一道摘花瓣的题，边做游戏边做题。

英文原文如下：Kate has 4 flowers, one with 6 petals, one with 7 petals, one with 8 petals and one with 11 petals. Kate tears off one petal from three flowers. She does this several times, choosing any three flowers each time. She stops when she can no longer tear one petal from three flowers. What is the smallest number of petals which can remain?

中文翻译如下，凯特有 4 朵花，一朵有 6 瓣，一朵有 7 瓣，一朵有 8 瓣，一朵有 11 瓣。 凯特从三朵花上撕下一片花瓣。她每次随意选一朵花摘掉一瓣，重复了几次。当她再也无法从三朵花中撕下一片花瓣时，她就停手了。问剩下的花瓣最少是多少？

评论区对答案，➥ 关注「小留洋」，一起研究海外数学题。

认识自己的无知就是最大的智慧唯有美食和爱不可辜负人性的光辉在于对大苦难无尽的忍耐和牺牲 ——《梦里花落知多少》 三毛美好的一天开始了，今日份的快乐在于积极向上热爱生活。雪崩的时候，没有一片雪花是不崩的 If you shed tears when you miss the sun, you also miss the stars.
如果你因失去了太阳而流泪，那么你也将失去群星了。

那种电影的感觉来了。

赛博朋克的科幻感，倚在落地窗前看霓虹灯，但下一秒就准备前往基地抓捕逃逸的克隆人。

I've... seen things you people wouldn't believe...
Attack ships on fire off the shoulder of Orion.
I watched C-beams glitter in the dark near the Tannhäuser Gate.
All those... moments... will be lost in time, like tears... in... rain.