请教几题prep的数学

waigedet · 发表于 2010-6-24 04:36:24

1. If (1/5)^m (1/4)^18=1/2(10)^35, then m=

A.17 B.18 C.34 D.35 E.36............35

2. For a finite sequence of nonzero numbers, the number of variations in sign is defined as the number of pairs of consecutive terms of the sequence for which the product of the two consecutive terms is negative. What is the number of variations in sign for the sequence 1, -3, 2, 5, -4, -6

1. one 2.two 3.three 4.four 5.five...............3

3. Circular gears P and Q start rotating at the same time at constant speeds. Gear P makes 10 revolutions per minutes, and gear Q makes 40 recolutions per minute. How many seconds after the gears start rotating will gear Q have made exactly 6 more revolutions than gear P?
1.6 2.8 3.10 4.12 5.15

4. In the figure shown, the measure of angle PRS is how many degrees greater than the measure of angle PQR?
抱歉我不会画图...大概描述一下....三角形QPR, 在QS上有一点R跟P相连...S是直角

1. The measure of angle QPR is 30
2. The sum of the measure of angles PQR and PRQ is 150

5. For the students in class A, the range of their heights is r centimeters and the greatest height is g centimeters. For the students in class B, the range of their heights is s centimeters and the greatest height is h centimeters. Is the least height of the students in class A greater than the least height of the students in class B?
1. r<s
2. g>h

6. If it took Carlos 1/2 hour to cycle from his house to the library yesterday, was the distance that he cycled greater than 6 miles? ( 1 mile=5280 feet)
1. The average speed at which Carlos cycled from his house to the library yesterday was greater than 16 feet per second
2. The average speed at which Carlos cycled from his house to the library yesterday was less than 18 feet per second

请教几题prep的数学

所属分类: GMAT考试

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