PS - printing throughput

If it takes 6 identical printing presses 4 hours to print 5000 newspapers, how long would it take to print 3 of these presses to print 3000 newspapers?

A. 3 hours, 20 minutes
B. 4 hours, 20 minutes
C. 4 hours, 48 minutes
D. 5 hours, 48 minutes
E. 6 hours, 50 minutes

source: www.800score.com

PS - Length of a segment

In the diagram above, BD = 8, AB = 6 and ED=5? What is the length of AE? (Note: figure not drawn to scale.)

A. 3
B. 4
C. 5
D. 7
E. 10

source: www.800score.com

PS - Microchip price

The price of a microchip declines 67 percent every 6 months. At this rate, approximately how many years will it take for the price of an $81 microchip to reach $1 ?

A. 1.5
B. 2
C. 3
D. 13
E. 13.5

source: www.800score.com