Understanding the Monty Hall Problem

The Monty Hall Problem is one of the famous puzzles that is not very easy to understand.  When Marilyn vos Savant (listed as Highest IQ by Guiness) posted this question in “Ask Marilyn” of Parade magazine, 10,000 readers including 1000 PhD holders wrote to the magazine asserting that Marilyn was wrong despite explanations and mathematical calculations shown. The Monty Hall problem is shown below.

The Monty Hall Problem

Suppose you’re on a game show, and you’re given the choice of three doors: Behind one door is a car; behind the others, goats. You pick a door, say No. 1, and the host, who knows what’s behind the doors, opens another door, say No. 3, which has a goat. He then says to you, “Do you want to pick door No. 2?” Is it to your advantage to switch your choice?  Continue reading

Ted Talk: How to escape education’s death valley

If you have watched Changing Education Paradigms or Do Skills Creativity, then, you will surely love another lecture from Sir Ken Robinson.  This TED Talk discusses about the 3 principles crucial to the human mind to flourish and how the current system of education work against them. This talk is a must-watch for all teachers, educators, school administrators and policy makers.

For more talks by Sir Ken Robinson, visit his page on TEDTalk.

iPad App: Scan Documents into PDF with Genius Scan

Genius Scan is very handy app I discovered recently while scanning documents.  It allows you to take a photo of a document and export them as JPEG or PDF files. What makes Genius Scan better than other apps is its ability to detect edges and its perspective correction.  This can be useful for teachers or students who want to scan pages of books and read them on their iPads.

Once you take a photo, the app detects the page frame, crops it, correct its persective, and remove unnecessary background. This means that you don’t need a perfect straight shot. In addition, you can also adjust the corners and borders of the frame.

genius scan

Genius Scan allows scanned images to be emailed as a JPG or PDF file. It allows export to Box, Dropbox, Evernote, Expensify, Facebook, Google Drive, OneDrive, OneNote, Twitter, and many others.

Genius scan is also available as an iPhone app and an iPod Touch app.

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