Authorities don't have data about how many of the disappearances are connected with organized crime.
It is uncertain how many of the 67 workers at the factory will be offered jobs.
But just how many of the site's users had actually demanded Zuckerberg's bowing and scraping?
How many of the people who are waiting to see the first reviews will be convinced?
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But it is not yet clear how many of the other changes are cosmetic.
How many of the school's alumni rank on The Forbes 400 list of richest Americans?
How many of the original companies in the DJIA are still even in existence?
How many of the rest of us can say that with any degree of assuredness?
But it isn't clear yet how many of the 7, 000-strong at-risk group have now been fully vaccinated.
It's not clear how many of the cardinals now in Rome are among those who can vote.
Have you ever noticed how many of the most prominent conservative voices in America sound more like liberals?
Put it another way: How many of the 14 will approve of President Bush's choice to succeed Rehnquist?
Scottish Conservative justice spokesperson David McLetchie highlighted how many of the cases reported led to convictions and sentencing.
"The records show how many of the citizens of Hull were involved in defending the city, " she added.
For example, how many of the 3, 001 tips actually identified fraud or wrongdoing?
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The administration officials would not say how many of the troops leaving Iraq would be redeployed to Afghanistan.
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How many of the 14 signatories will agree on what constitutes extraordinary circumstances?
It isn't clear if the talks will lead to a settlement or how many of the parties would sign on.
Some readers may wonder how many of the Tin Pan Alley tunesmiths he cites consciously composed along these thoughtful lines.
Under News International's proposals, in each individual case the amount of compensation will depend on how many of the following criteria apply.
There's no way to tell how many of the country's 747, 408 registered sex offenders have the support of families, friends or otherwise.
For example, for each subscriber, you can understand how many of the people she talks to are also subscribers to your network.
The fact is, no one knows for sure how many of the genetic tests being pushed for various conditions are actually useful.
It is difficult to ascertain exactly how many of the 350 U.S. soldiers died in captivity and on the subsequent death march.
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How many of the 200, 000 new jobs promised over the next four years would go to the long-term young unemployed, asked Mr Dismore.
The first is a raw accounting of how many of the eight potential knockout round participants were correctly identified by each model or pundit.
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It is striking how many of the stalls are run by people who in the west would be dismissed as too old to work.
It is unclear how many of the 18 members of the panel will support the report when a final vote is taken on Friday.
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How many of the tea bags will be need for a family per day is difficult to answer... it has to be very, very cheap.
Remember how many of the multiple-choice questions had several likely answers?
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