Anticlockwise [1]
Clockwise [2]
Anticlockwise [4]
Clockwise [5]
Anticlockwise [7]
Clockwise [8]
Well done.
You have completed this level and can claim a trophy.
Close
Level 1 - One cog catching odd and even numbers
Level 2 - One cog catching square, prime, cube and triangular numbers
Level 3 - A level 1 cog and a level 2 cog
Level 4 - Two level 2 cogs
Level 5 - Two level 2 cogs and a level 1 cog
Players take turns placing numbers from 1-9 on the grid. Avoid making three-digit prime numbers in any direction! So far this activity has been accessed 313 times and 3 Transum Trophies have been awarded for completing it.
Rotate the cogs to catch the numbers in the correct sections. This can be done by clicking the clockwise and anticlockwise buttons above or by pressing the indicated number keys on the keyboard or number pad.
When you are ready to begin press the Start button.
You can earn a Transum trophy for catching 30 numbers correctly. There are five different levels arranged in increasing order of difficulty.
Can you get to the target number by multiplying together four different one digit numbers? Can you do it in three different ways? There are nine levels to this online challenge and a virtual Transum Trophy available for each level.
The number sequences used in this activity are as follows:
Odd: 1,3,5,7,9,11,13,15,17,19,21,23,25,27,29 ...
Even: 2,4,6,8,10,12,14,16,18,20,22,24,26,28,30 ...
Square: 1,4,9,16,25,36,49,64,81,100 ...
Cube: 1,8,27,64 ...
Triangular: 1,3,6,10,15,21,28,36,45,55,66,78,91...
Prime: 2,3,5,7,11,13,17,19,23,29,31,37,41,43,47,53,59,61,67,71,73,79,83,89,97 ...
Do you have any comments? It is always useful to receive feedback and helps make this free resource even more useful for those learning Mathematics anywhere in the world. Click here to enter your comments.
