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Math
Mac can finish a job in days and Jack can finish the same job in
days. After working together for
days, Mac left and Jack alone worked to complete the remaining work in
days. If Mac and Jack completed an equal amount of work, how many days would have it taken Jack to complete the entire job working alone?
(1) days
(2) days
Correct Answer - C - (click and drag your mouse to see the answer)
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Verbal
When feeding, aquatic birds known as phalaropes often spin rapidly on the water’s surface, pecking
for food during each revolution. To execute these spins, phalaropes kick one leg harder than the
other. This action creates upwelling currents. Because plankton on which phalaropes feed typically
occurs in greater quantities well below the surface, it is hypothesized that by spinning phalaropes
gain access to food that would otherwise be beyond their reach.
Which of the following, if true, most strongly supports the hypothesis?
A. Phalaropes rarely feed while on land.
B. A given phalarope spins exclusively either to the right or to the left.
C. Phalaropes sometimes spin when they are not feeding.
D. Different phalaropes spin at somewhat different rates.
E. Phalaropes do not usually spin when food is abundant at the surface.
Correct Answer - E - (click and drag your mouse to see the answer)
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