Showing posts with label Continue the Series. Show all posts
Showing posts with label Continue the Series. Show all posts

Friday, 12 December 2014

Continue the Series



 1, 3, 6, 10
Name the Next three numbers in the series   
   
Answer:   15, 21, 28. These are triangular numbers:

1, 3, 6, 10, 15 21 28    …….  N (n+1) /2
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