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)?
Examples
Which times is this possible and which times impossible?
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?
Use the digits of the current time to make as many different calculations as possible all with different answers.
All four digits must be used and each must appear once only in each of your calculations.
Next choose a different time that you think will produce more calculations than the present time.
Topics: Starter | Arithmetic | Mixed | Number | Problem Solving | Puzzles
How did you use this starter? Can you suggest
how teachers could present or develop this resource? Do you have any comments? It is always useful to receive
feedback and helps make this free resource even more useful for Maths teachers anywhere in the world.
Click here to enter your comments.
Previous Day | This starter is for 14 June | Next Day
| 09 01 | 0x9=0 | 0x1=0 |
| 09 02 | 0x9=0 | 0x2=0 |
| 09 03 | 0x9=0 | 0x3=0 |
| 09 04 | 0x9=0 | 0x4=0 |
| 09 05 | 0x9=0 | 0x5=0 |
| 09 06 | 0x9=0 | 0x6=0 |
| 09 07 | 0x9=0 | 0x7=0 |
| 09 08 | 0x9=0 | 0x8=0 |
| 09 09 | 90 | 90 |
| 09 10 | 0x9=0 | 1x0=0 |
| 09 11 | 90=1 | 11=1 |
| 09 12 | 90=1 | 12=1 |
| 09 13 | 90=1 | 13=1 |
| 09 14 | 90=1 | 14=1 |
| 09 15 | 90=1 | 15=1 |
| 09 16 | 90=1 | 16=1 |
| 09 17 | 90=1 | 17=1 |
| 09 18 | 90=1 | 18=1 |
| 09 19 | 90=1 | 19=1 |
| 09 20 | 0x9=0 | 0x2=0 |
| 09 21 | √9+0=3 | 2+1=3 |
| 09 22 | 90=1 | 2÷2=1 |
| 09 23 | 0+9=9 | 32=9 |
| 09 24 | √9+0=3, 3!=6 | 2+4=6 |
| 09 25 | √9+0=3 | 5-2=3 |
| 09 26 | √9+0=3 | 6÷2=3 |
| 09 27 | 0+9=9 | 2+7=9 |
| 09 28 | 90=1 | 82=64, 6+4=10, 1+0=1 |
| 09 29 | 0+9=9 | 92=81, 8+1=9 |
| 09 30 | 0x9=0 | 0x3=0 |
For more ideas see Alan Sturgess' Maths Puzzle Investigation video.
Your access to the majority of the Transum resources continues to be free but you can help support the continued growth of the website by doing your Amazon shopping using the links on this page. Below is an Amazon link. As an Amazon Associate I earn a small amount from qualifying purchases which helps pay for the upkeep of this website.
Educational Technology on Amazon
|
Teacher, do your students have access to computers such as tablets, iPads or Laptops? This page was really designed for projection on a whiteboard but if you really want the students to have access to it here is a concise URL for a version of this page without the comments: Transum.org/go/?Start=June14 However it would be better to assign one of the student interactive activities below. |
|
Here is the URL which will take them to a related student activity.
The digital clock used on this page is adapted from code provided by Radoslav Dimov copyright © 2009.
