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sum of all prime numbers in a serie

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by kvcpk » Fri Sep 17, 2010 7:07 am
I dont think GMAT would ever ask such question.

I would definitely write them out and add, if in the test.

Depending on the options, we can guess too.

2+3+5+7+11+13+17+19+23+29+31+37+41+43+47+53+59+61+67+71+73+79+83+89+97


= 1060?
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by Fractal » Fri Sep 17, 2010 7:12 am
ok, thank you for your response! i didn't know if there exist a formula for this...

by the way, what does a "serie of consecutive integers" exactly mean?

is it just

1, 2, 3, 4, 5, ...

or could it also be

5, 10, 15, 20, ... or 2, 4, 6, 8, ...

or even

3, 7, 11, 13, ...

thanks a lot
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by kvcpk » Fri Sep 17, 2010 7:32 am
Fractal wrote:ok, thank you for your response! i didn't know if there exist a formula for this...

by the way, what does a "serie of consecutive integers" exactly mean?

is it just

1, 2, 3, 4, 5, ...

or could it also be

5, 10, 15, 20, ... or 2, 4, 6, 8, ...

or even

3, 7, 11, 13, ...

thanks a lot
Consecutive integers should always be consecutive numbers.

1,2,3.. are consecutive integers.

52,53,54... are again consecutive integers.

But, 5,10,15 are not consecutive.

Hope this helps!!
"Once you start working on something,
don't be afraid of failure and don't abandon it.
People who work sincerely are the happiest."
Chanakya quotes (Indian politician, strategist and writer, 350 BC-275BC)
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by Fractal » Fri Sep 17, 2010 7:36 am
ok, so otherwise they will write for example "consecutive prime numbers" or "consecutive even numbers"...

thank you
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