1.
If a certain animated cartoon consists of a total of 17280 frames on film, how many minutes will it take to run the cartoon?
It takes 6 times as long to run the cartoon as it takes to rewind the film, and it takes a total of 14 minutes to do both
2.
Is the number of seconds required to travel d1 feet at r1 feet per second greater than the number of seconds required to travel d2 feet at r2 feet per second?
3.
On a scale that measures the intensity of a certainphenomenon, a reading of n + 1 corresponds to an intensity that is 10 times the intensity corresponding to a reading of n. On that scale, the intensitycorresponding to a reading of 8 is how many times as great as the intensity corresponding to a reading of 3 ?
4.
Each · in the mileage table above represents an entry indicating the distance between a pair of the ?ve cities. If the table were extended to represent the distances between all pairs of 30 cities and each distance were to be represented by only one entry, how many entries would the table then have?
5.
If 3<x<100, for how many values of x is x/3 the square of a prime number?
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发表于 2012-11-7 12:42:04
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