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# A family has a child every j years.  The oldest child is t years old.

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Joined: 24 May 2010
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A family has a child every j years.  The oldest child is t years old.  [#permalink]

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10 Aug 2010, 14:40
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0% (00:00) correct 100% (00:07) wrong based on 2 sessions

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A family has a child every j years.  The oldest child is t years old. If they have a child 2 years from now, how many children will they have in total.

(t+2)/j +1
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Re: A family has a child every j years.  The oldest child is t years old.  [#permalink]

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10 Aug 2010, 15:53
My attempt:

When the couple have their 2 kid, their eldest kid will he J years old.

Hence the number of kids = t/j + 1 (new born infant).

= j/j +1 ==> 2

When the couple have their 3rd kid, their eldest kid will be 2J years old.

Hence the number of kids = t/j + 1 (new born infant).

= 2j/j +1 ==> 3

The +1 is for the new born infant.
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Re: A family has a child every j years.  The oldest child is t years old.  [#permalink]

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23 Sep 2017, 22:03
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Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

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Re: A family has a child every j years.  The oldest child is t years old. &nbs [#permalink] 23 Sep 2017, 22:03
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