Math
One filter decreases the concentration of harmful substances in water by half. If water that contains less than 0.1 percent of harmful substances is considered clean, how many filters are required to clean 200 liters of water containing 0.5 liters of harmful substances ?
A. 2
B. 3
C. 5
D. 6
E. 8
Question Discussion & Explanation
Correct Answer - A - (click and drag your mouse to see the answer)
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Verbal
Archaeologists have recently found in various grave sites in the mexican state of veracruz , small ceramic animals with attached wheels . At first this find might seem to discredit the belief that the wheel and its uses were unknown in pre-columbian culture .On reflection ,however, it would seem that discovery actually bears out this belief . To be familiar with these toys and yet not to apply the principle of the wheel to daily tasks such as carting,trasportation and pottery-making must indicate a lack of understanding of the wheel and potential benefits.
Which of the following best expresses the argument made in the passage above?
A. If the pre-Columbian people of Veracruz, had understood the principle of the wheel, they would not have attached wheels to ceramic animals.
B. If the pre-Columbian people of Veracruz, had understood the principle of the wheel, they would have adapted it to everyday use
C. If the pre-Columbian people of Veracruz, had understood the principle of the wheel, they would have adapted the idea of the wheel from the wheeled ceramic figures
D. Pre-Columbian people of Veracruz, must have known of the wheel and its use because they attached wheels to ceramic animals.
E. Since the pre-Columbian people of Veracruz did not know of the wheel or its uses, the ceramic animals found in the grave sites must be the remains of later cultures.
Question Discussion & Explanation
Correct Answer - C - (click and drag your mouse to see the answer)
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