By Arnold M. Friedman
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Extra info for Actinides in the Environment
In fact, if you have 50¢ in your pocket, you say that you have half a dollar. Reducing a fraction does not change its value. Fractions CHAPTER 4 MATH FOR CIVIL SERVICE TESTS Follow these steps to reduce a fraction: 1. Find a whole number that divides evenly into both numbers that make up the fraction. 2. Divide that number into the top of the fraction, and replace the top of the fraction with the quotient (the answer you got when you divided). 3. Do the same thing to the bottom number. 4. Repeat the ﬁrst three steps until you can’t ﬁnd a number that divides evenly into both numbers of the fraction.
D. 5. b. 10. a. The LearningExpress Test Preparation System CHAPTER 2 MATH FOR CIVIL SERVICE TESTS How Did You Do? You may have simply gotten lucky and actually known the answer to one or two questions. In addition, your guessing was more successful if you were able to use the process of elimination on any of the questions. Maybe you didn’t know who the third Chief Justice was (question 7), but you knew that John Jay was the first. In that case, you would have eliminated answer d and, therefore improved your odds of guessing right from one in four to one in three.
D. 1÷9 1 ÷ 81 1 ÷ ͙3 ෆ 1 ÷ ͙9 ෆ 34. (−3)3 + (3)3 is equivalent to a. 54 b. 27 c. 0 d. −27 35. ͙70 ෆ is between which of the following two numbers? a. 5 and 6 b. 6 and 7 c. 7 and 8 d. 8 and 9 36. 183 is how much greater than 162? a. 6,088 b. 5,576 c. 265 d. 68 MATH FOR CIVIL SERVICE TESTS 39 40 MATH FOR CIVIL SERVICE TESTS CHAPTER 3 Arithmetic, Powers, and Roots 37. 422 is how much greater than 242? a. 1,188 b. 1,764 c. 576 d. 2,340 2(4ෆ 2 is equivalent to 38. ͙(−3) ෆ) ෆ a. 12͙2 b. −͙12 ෆ2 c. 12 d.