โจทย์เลข สำหรับครูสมัยนี้

I came across this ‘picture quiz’ yesterday - when it was raining cats-and-dogs at my place (down-under). There weren't many things to do inside the house. So, I surfed the Net and found this picture that grabbed me. 

credit image https://qph.fs.quoracdn.net/main-qimg-2f0f77af53cacdb350a362927b4b2dfe-lq

I looked for a while before I could understand the meaning of the picture and its usefulness. (Can you?)

The picture is from a suite of teachers' experiences told in Quora.com [ https://www.quora.com/As-a-teacher-what-is-the-harshest-truth-a-student-has-ever-taught-you ]. They are all interesting and showing things a teacher may learn from her/his students. Some of these may have already happened to you. 

Back to the picture quiz  above. I will let you work it out for a few days before I come back and add an answer.  [ 🐼️+🍅️ = 10; 🐼️+🦋️ = 20; 🦋️+🍅️ = 24; 🐼️+🦋️+🍅️ = ? ❓️  https://www.gotoknow.org/posts/702705 ]

In the meanwhile, I am asking if we [can] have [already] question-in-picture collections that we can share. It would be good for other teachers and parents – and of course children - to develop brain power ;-)

[Added some background information: 

• "พีชคณิต" เป็นคำศัพท์ภาษาสันสกฤต พบครั้งแรกในตำราคณิตศาสตร์ชื่อสิทธานตะ ศิโรมณิ ของนักคณิตศาสตร์อินเดียชื่อ ภาสกร หรือ ภาสกราจารย์ ส่วนในภาษาอังกฤษ แอลจีบรา (algebra) มาจากภาษาอาหรับคำว่า الجبر (อัลญับร์) แปลว่า การรวมกันใหม่ หรือการจัดกระดูก  https://th.wikipedia.org/wiki/พีชคณิต 
•  bija (MW-Sanskrit-English Dictionary) .. ---> calculation of original or primary germs , analysis , algebra cf. Col. ---> truth ( as the seed or cause of being ) cf. L.
  gaNita 2[ gaNita ] mfn. counted, numbered, reckoned, calculated cf. MBh. cf. BhP. cf. Vet
  ---> ( [ am ] ), n. reckoning, calculating, science of computation: arithmetic, algebra, geometry
• vici (MW-Sanskrit-English Dictionary) .. ---> to make anything discernible or clear , cause to appear, illumine R.  ---> to search through , investigate , inspect , examine  ---> to look for , long for , strive
• พืช มาจาก bīja (P. & S.)  nt.; seed; germ; generating element.   (bīja บีชะ เสียงยาว  bija บิชะ เสียงสั้น)

So it seems that Thai has modified the word พีชคณิต (beach ganit) from the original พิชคณิต (bich --) ]