The regions that a design with six circles will create is 31.
How can this be calculated?
1 circle = 1 region.
2 circles = 3 regions then there is an increase by 2, (3-1)
3 circles = 7 regions with an increase of (7 - 30) = 4.
4 circles =13 regions with an increase of (13 - 7 )= 6.
5 circles =21 regions with an increase was of (21 - 13) = 8.
Then the increase of (2,4,6,8) then the next number will be 10 which are all consecutive multiples of 2,
Hence, with 6 circles, we will have (21 + 10) = 31 regions.
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