[外语类试卷]GRE（QUANTITATIVE）练习试卷10及答案与解析.doc

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1、GRE（ QUANTITATIVE）练习试卷 10及答案与解析 1 72= _ 2 3 Express 33 as a square: _ 4 72-32= 5 GRE（ QUANTITATIVE）练习试卷 10答案与解析 1 【正确答案】 72simply means 7 times 7, which is 49. 2 【正确答案】 Find the square roots before you do the division. The square root of 36 is 6, and the square root of 4 is 2. You then divide 6 by 2

2、, which equals 3. 3 【正确答案】 Three times 3 can be stated as “3 squared.“ The proper way to write this is 32. 4 【正确答案】 Both numbers are raised to the power of 2 (they are squared). You must first find these squares before you do your subtraction; 7 squared is 49, and 3 squared is 9. So, the answer is 49-9, which equals 40. 5 【正确答案】 This problem requires you to find a square root of a number as well as a number squared. The square root of 64 is 8 (64 is called a “perfect square“ because its square root is a whole number), and 2 squared equals 4. The answer is 8 times 4, which is 32.