1. X is a positive integer. 2-height of X is defined as the greatest negative integer n where 2^n is a factor of X. K and M are two positive integers. Whether 2-height of K is greater than 2-height of M?
a. K is greater than M
b. K is even times of M

2. X, Y and Z are three different prime numbers. How many factors does X*Y*Z have?
3. XYZ?
a. XYZ1
b. XYZ^2=1

4. XYZ0?
a. XY0
b. YZ0

5. 7^3*7^4=?
6. A is 25% less than B and B is 25% less than C. How much percent is A less than C?
7. A can finish one job in X hours. A does this job three times as fast as B does. If A and B work together, how many hours can they finish the job?
8.能否確定N?， 條件是
1 ^1/2，^1/2 是連續整數
2 ^1/2，^1/2 是連續整數
我答D
9.還有就是兩條平行線，一條有5個點，一條4個點問能組成多少個直角三角形
我答70個
10. 一個正三角形，邊長5，中間內切一圓，問圓的面積
11. 在坐標系中有3點P,M,N,.問從P-M-N的距離比從P直接到N的距離大多少
12. R,S,T為正整數，問T/S^2是不是是整數？ 1）T/RS是整數 2）R/S是整數
13. 0.6是0.0015的多少倍？（400）
14. 唯一的jj：有一box,厚度of the plastic 是1，inner三個邊長為x,y,z，求plastic 的體積。-xyz把式子展開就是了。
15.有一梯形ABCD，AD=CD，P為AD上一點，求梯形面積。
PD=5 BC=8 我選E
16.有12個什么DD,其中3個defective,某人買2個randomly,問neither is defective的概率?
17.一直角三角形,直角頂點為,一點為,另一點為,求b?
18.2個數的積為48,其中一個比另一個大2,求大的那個數?
19.一個半圓的street,直徑為1mile,7個點把這個半圓分成相等的8段,某人以15mile/hour從最左一點開始走,問3分鐘后他在哪2點之間?
20. 一公司A業務占總收入的25%，B業務占t%,C業務占剩下的，B業務收入是150，000 C業務是總收入-225，000 求t=?
My Answer: 50%