Can you use the digits on the left of this clock along with any mathematical operations to equal the digits on the right (also with any mathematical operations)?
Which times is this possible and which times impossible?
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Answers really depend on the level of mathematics involved so there are no definative answers to this activity.
Here are a selection of solutions covering the time from 9am to 9:30am
|09 24||√9+0=3, 3!=6||2+4=6|
|09 28||90=1||82=64, 6+4=10, 1+0=1|
|09 29||0+9=9||92=81, 8+1=9|
For more ideas see Alan Sturgess' Maths Puzzle Investigation video.
Teacher, do your students have
access to computers?
Here a concise URL for a version of this page without the comments.
Here is the URL which will take them to a number game.
Casio Classwiz Calculator
There is currently a lot of talk about this new calculator being the best in its price range for use in the Maths classroom. The new ClassWiz features a high-resolution display making it easier to view numerical formulas and symbols but it isn't a graphical calculator as such (it has the capacity to draw graphs on your smart phone or tablet, via a scannable QR code and an app).
As well as basic spreadsheet mode and an equation solving feature you also get the ability to solve quadratic, cubic or quartic polynomial inequalities and the answer is given just as it should be written down, using the correct inequality symbols!
This calculator has a high-performance processor and twice the memory of previous models ensuring speedy operation and superior computational power.more...
The digital clock used on this page is adapted from code provided by Radoslav Dimov copyright © 2009.