Triangular Numbers

Descripción

(Numbers) Maths Learning Apunte sobre Triangular Numbers, creado por simon.shah el 05/10/2013.
simon.shah
Apunte por simon.shah, actualizado hace más de 1 año
simon.shah
Creado por simon.shah hace alrededor de 11 años
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There is a really easy way to work out how many dots in a specific sequenceWe know the 4th sequence has 10 dotsTake 4 and multiply or by 4+1, or 54 x 5 = 20Then half that numberSo 20/2 = 10Very cool :-)

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