# Thread: which day of the month is my birthday ?

1. ## which day of the month is my birthday ?

As my birthday approaches I start to collect leaves - a little bizarre perhaps, but I enjoy it! On the first day of the month I collect one leaf, on the second day I collect two and so on. So by my birthday I will have collected 378 leaves altogether. On which day of the month is my birthday?

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suresh

Its on 28th.
right?

3. ## Re: which day of the month is my birthday ?

No barbie...Its not a correct answer...

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suresh

4. ## Re: which day of the month is my birthday ?

Oh.. sorry.
Its 27th of that month.

5. ## Re: which day of the month is my birthday ?

folllow the rule:

N(N+1)=2*total sum

6. ## Re: which day of the month is my birthday ?

Jainbrijesh and Barbie both of them correct...

The formula is n(n+1)/2(sum of first n numbers) = 378

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suresh

7.

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