1.  When I splitthe cost of a video game equally with 4 friends, we each pay $12. How much moredo each of us pay if I split the cost equally with only 3 friends?

A. $3.00      B.$4.00      C.$15.00      D.$16.00

解析：需要注意两点，一是人数总和需要加上自身；二是how much more 中more，求的是四个人分比五个人分每个人多负担多少钱。因此，本题应为12×5¸4-12=3

 

2. At 5:00 P.M. on a Friday, Hal got locked in the vault.He was in there for 5040 minutes before it opened. On what day did it open?

A. Sunday    B. Monday   C. Tuesday    D. Wednesday

解析：本题难点在于起始时间为下午五点，需要计算整天剩余小时加上起始日的时间是否构成新的一天。5040¸60=84小时 84-24×3=12小时。相当于过了84个小时后是星期几，下午五点再过12小时为第二天的早上5点，因此，为Tuesday。

 

3. The sum of 7 consecutive integers is 63, the sumof the largest and the smallest of the 7 integers is ( ).

A. 18      B. 24      C. 42      D. 64

解析：本题难题在于读懂题目。consecutiveintegers为连续的正数。两种解题方法，一是1+2+3+4+5+6=21，（63-21）¸7=6， 6+12=18；二是设最小的为x，最大的为x+6，（x+x+6）×7¸2=63，解方程x=6, x+x+6=18

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