What is special about the circles that are not split up?
The circles that are not split up are prime numbers.
Can you explain what is happening in the top row?
In the top row 2 & 3 are prime numbers so they are in their own circles along with 5 & 7 but 4, 6, 8 & 9 are in split up segments because it means they are composite numbers. The colours mean which number to times together to make that number & the number of segments mean how many times to multiply by.
What do you notice about the colours in the fifth column?
The circles in the fifth column all have yellow in them because they are all multiples of 5. The other colours represent the number(s) that you have to multiply 5 by to get a number that ends in 5 because they are all in the 5 times table.
What is happening in the far right column?
The number at the top of the far right hand column is 10.This is represented by red & yellow because they are the numbers 2 & 5 because they multiply to make 10. 1O can’t have its own number because it isn’t a prime. They all have at least one red & yellow segment to represent the number 10 (2 x 5) and a variation of other segments to equal the next number in the ten times table. For example, 70 has three segments, red, yellow & blue this represents 2 x 5 x 7=70.