1. What is the greatest prime factor of 4 ^17 - 2 ^ 28 ?
ans......7
2. In the xy-plane. link k has positive slop and x-intercept 4. If the area of the triangle
formed by link k and the two axes is 12. What of the y- intercept of link?
ans.......-6
3. IS the positive interger J divisible by a greater number of different prime numbers than
the positive interger k ?
(1) j is divisible by 30
(2) k=1000
ans....(C)
4.
How much time did it take a certain car to travel 400 kilometers?
(1) The car traveled the first 200 kilometers in 2.5 hours
(2) If the car's average speed had been 20 kiolmeters per hour
greater than it was, it would have traveled the 400 kilometers in 1 hours less time than
it did.
ans.....(B)
thanks
挺簡單的嘛,看來是自己頭腦不太清楚。
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