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by  |  02-Oct-2016 15:13

To begin at the beginning (well, your beginning, anyway), you surely had two parents, a mother and father: and so on (and similarly for “fathers” instead of “mothers” at any level).

Since each ancestor has two parents (one mother and one father), you have a total of 2n ancestors at level n: two parents, four grandparents, eight great-grandparents, sixteen great-great-grandparents, and so on.

On the other hand, if they each have five children of their own, then you will have twenty-five grandchildren – a lot more.

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If you have children yourself, then their children are your grandchildren, and your grand-children’s children are your great-grandchildren, and so on: (and similarly for “son” instead of “daughter” at any level).

Unlike with ancestors, there is no simple formula for your number of descendants.

For starters, if your parents have additional children besides you, then they are of course your siblings, that is your sisters and brothers: (Here, and throughout, relationships to “you” are written within the boxes, and relationships between other pairs of individuals are indicated by connecting lines.) If you and your siblings each have children, then those children are first-cousins of each other.

Then, if the two first-cousins each have children, then those children are second-cousins of each other; and their children are third-cousins, and so on: (and similarly for “son” instead of “daughter” at any level).

A series of challenges resulted in them being judged as the most identical of the 30 sets of twins to arrive at Pineapple Dance studios in London yesterday morning, in a competition held by Cadbury's Wispa Duo.

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