Hi All,
This DS prompt serves as a nice example of how doing some 'up-front' work BEFORE you deal with the 2 Facts can help you to spot any inherent patterns in the question.
Here, we're told that we have a certain number of single babies and a certain number of twins born in a hospital. We're told that the TOTAL number of babies is X. We're asked if X is ODD?
Since twins come 'two-at-a-time', there will always be an EVEN number of twins. It's the number of SINGLE babies that will determine whether X is ODD or EVEN. Making THAT deduction up front makes dealing with the 2 Facts a remarkably simple task.
If you get in the habit of taking notes and putting in a little work up-front, you'll find that a number of DS questions on Test Day become considerably easier to answer.
GMAT assassins aren't born, they're made,
Rich
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