thnik again!

We have a few days off from work so the blog is closed till Tuesday while we explore Khao Yai National Park.

Source: Division by Zero.

Pure mathematics is, in its way, the poetry of logical ideas. - Max Wilhelm Dehn

How many four digit numbers are there where the digits are ascending from left to right?

It’s how you deal with failure that determines how you achieve success. - David Feherty

- I see you got a new calculator. Congratulations!
- Thank you, but it is no good!
- How come?
- I set it to degree mode, typed in a lot of 5s, pressed 1/x, followed by sin.
- And?
- How can I believe the result?

Problem source: Division by zero.

England and America are two countries separated by a common language. - George Bernard Shaw

Watch the video.

Push the blocks into their holes by clicking on the arrows here. Hold the mouse over the blocks and the arrows will appear. Fixed arrows on the board redirects the boxes.

What is less wasteful: to cut out a circle from a square, or a square from a circle?

Problem source: MathsChallenge.net.