GRE考试

【单选题】What is the remainder when 7³ is divided by 9
A、0
B、1
C、2
D、3
E、5
网考网参考答案：B
网考网解析：
To solve this problem, first find 73 as follows: 7×7×7=343 Then use long division to find the remainder when 343 is divided by 9. Take the dividend (343) one digit at a time starting from the left. Because 9 does not divide evenly with 3, use the first two digits (34). Find the biggest multiple of 9 that is less than 34, in this case 9 ~ 3, or 27. Subtract 27 from 34 to get a remainder of 7. Next, "bring down" the next digit of the dividend (3) to get 73. Find the biggest multiple of 9 that is less than 73, or 9×8=72. Subtract 72 from 73 to get a remainder of 1. Because there are no more digits in the dividend, 1 is the final remainder. document.getElementById("warp").style.display="none"; document.getElementById("content").style.display="block"; 查看试题解析出处>>