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It is a nice ebook if you would like to check math for any urban or nation examination. This booklet offer plenty of examples and explains how one can do the issues.

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Extra resources for Math for Civil Service Workers

Sample text

Express 98 as 2 factors, trying to make one of the factors a perfect square: ͙98 ෆ = ͙49 ෆ. × 2 Sometimes it takes a while to get used to figuring out how to rearrange the numbers under the radical. Just remember that if you can find a perfect square, you will be able to pull something out from under the radical. Here, 49 is a perfect square, so we can pull a 7 out from under the radical as follows: ͙49 × 2 = ͙49 ෆ ෆ × ͙2 ෆ = 7͙2 ෆ Thus, choice d is the correct answer. PRACTICE QUESTIONS 1. Find the sum of 7,805 and 987.

Lawrence gave $281 to Joel. If he originally had $1,375, how much money does he have left? a. $1,656 b. $1,294 c. $1,094 d. $984 3. Peter had $10,573 in his savings account. He then deposited $2,900 and $317. How much is in the account now? a. $13,156 b. $13,790 c. $7,356 d. $6,006 4. What is the positive difference between 10,752 and 675? a. 11,427 b. 10,077 c. 3,822 d. -10,077 5. 287,500 − 52,988 + 6,808 = a. 347,396 b. 46,467 c. 333,680 d. 241,320 6. What is the product of 450 and 122? a. 54,900 b.

33 = 27. Thus, the sum (−3)3 + (3)3 = −27 + 27 = 0. 35. d. 82 is 64 and 92 is 81. Thus, the square root of 70 (which is between 64 and 81) must be between 8 and 9. 43 44 MATH FOR CIVIL SERVICE TESTS CHAPTER 3 Arithmetic, Powers, and Roots 36. b. First, calculate both quantities: 183 = 18 × 18 × 18 = 5,832 and 162 = 256. Next, in order to find out how much greater the first quantity is, we find the difference (by subtracting): 5,832 − 256 = 5,576. 37. a. Calculate both of the given quantities: 422 = 1,764 and 242 = 576.

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