1- Choice C is correct
The correct answer is 9 2× M + N =18, then M + N =9. M > 0→ N could not be 9
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2- Choice C is correct
The correct answer is 72 106=53=3.33, the only choice that is greater than 3.33 is 72. (Recall that 132=0.5..) 72=3.5 ,3.5 > 3.33
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3- Choice C is correct
The correct answer is 4 The closest to 4.07 is 4 in the choices provided.
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4- Choice D is correct
The correct answer is: Greater than 24 If 14 of a number is greater than 6, the number must be greater than 24. 14 x > 6→ multiply both sides of the inequality by 4, then: x > 24
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5- Choice A is correct
The correct answer is 5 A represents digit 5 in the multiplication. 11×456=5,016
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6- Choice B is correct
The correct answer is 4.56 9.5 − 5.02=4.48, which is closest to 4.56
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7- Choice C is correct
The correct answer is 57 The ratio of lions to tigers is 8 to 6 or 4 to 3 at the zoo. Therefore, total number of lions and tigers must be divisible by 7. 4 + 3=7 From the numbers provided, only 57 is not divisible by 7..
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8- Choice A is correct
The correct answer is 40 Let x be the number. Then: 8 + x=24→ x=16→ 16 + 24=40
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9- Choice D is correct
The correct answer is (N + 3) N is even. Let’s choose 2 and 4 for N. Now, let’s review the choices provided.
A. N2=22=1, N2=42=2, One result is odd and the other one is even. B. N + 2=2 + 2=4, 4 + 2=6 Both results are even. C. 4 N=4×2=8, 4×4=16 Both results are even. D. N + 3=2 + 3=5, 4 + 3=7 Both results are odd.
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10- Choice C is correct
The correct answer is 1 The value of digit 4 in both numbers x and y are in the tens place. Therefore, they have the same value.
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11- Choice B is correct
The correct answer is (3 x − 4) 15=x×5→x=15÷5=3 x equals to 3. Let’s review the options provided: A. x + 5→3 + 5=8 15 is not divisible by 8. B. 3 x − 4→3×3 − 4=5 15 is divisible by 5. C. 10 − x→10 − 3=7 15 is not divisible by 7. D. x×2→3×2=6 15 is not divisible by 6.
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12- Choice B is correct
The correct answer is 103 3 + 4 + 2 × 2 + 22 + 4=206=103
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13- Choice A is correct
The correct answer is 5×13 23×52=106=53 5×13=53
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14- Choice D is correct
The correct answer is 9 x − 10=14→x=4 12 + y=17→y=5 x + y=4 + 5=9
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15- Choice A is correct
The correct answer is 16 4×5×8×2 is equal to the product of 20 and 16. (4×5)×(8×2)=20×16
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16- Choice C is correct
The correct answer is (6 degrees below zero) 16 − 22=− 6 The temperature at midnight was 6 degrees below zero.
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17- Choice C is correct
The correct answer is (side × side) area of a square = side × side
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18- Choice B is correct
The correct answer is 7 4 + 3 N=25→ 3 N=25 − 4=21→ N=7
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19- Choice A is correct
The correct answer is 21 cm2 Area of a triangle =12× (base) × (heiht) =12×6×7=21
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20- Choice D is correct
The correct answer is 28 First, find the pattern, 3 + 3=6→ 6 + 4=10→ 10 + 5=15→ 15 + 6=21 The difference of two consecutive numbers increase by 1. The difference of 15 and 21 is 6. So, the next number should be 28. 21 + 7=28
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21- Choice A is correct
The correct answer is 3 An equilateral triangle has 3 lines of symmetry.
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22- Choice B is correct
The correct answer is (2 + 3)×2=12 Let’s review the options provided: A. 3×5=15 This is true! B. (2 + 3)×2=12→2 + 3×2=10 This is not true! C. 10÷(7 − 2)=2 This is true! D. 5×(6 − 2)=20→5×4=20 This is true!
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23- Choice A is correct
The correct answer is 38 There are 6 red ball and 16 are total number of balls. Therefore, probability that Ann will pick out a red ball from the basket is 6 out of 16 or 66 + 10=616=38.
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24- Choice B is correct
The correct answer is 0.14 37 − 27=17=0.14
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25- Choice C is correct
The correct answer is 17.8 average =sum of all numbersnumber of numbers=5 + 8 + 11 + 27 + 385=17.8
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26- Choice D is correct
The correct answer is 45 15 percent of 300=15% of 300=15100×300=45
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27- Choice A is correct
The correct answer is 36 The shape has 6 equal sides. And is side is 6. Then, the perimeter of the shape is: 6×6=36
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28- Choice C is correct
The correct answer is 16 Four people can paint 4 houses in 10 days. It means that for painting 8 houses in 10 days we need 8 people. To paint 8 houses in 5 days, 16 people are needed.
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29- Choice C is correct
The correct answer is 19 N=3, then: 423 + 5=14 + 5=19
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30- Choice A is correct
The correct answer is 12 Write the numbers in order: 2, 6, 9, 12, 14, 17, 19 Median is the number in the middle. Therefore, the median is 12.
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31- Choice C is correct
The correct answer is 4,352.5 4,352.47546 rounded to the nearest tenth is 4,352.5
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32- Choice C is correct
The correct answer is (160 Pounds) 142 + 12 + 6=160
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33- Choice C is correct
The correct answer is 400 The biggest city is city C and the smallest city is city B. Number of men in city A is 700 and number of men in city C is 300. Then: 700 \ –\ 300 = 400
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34- Choice D is correct
The correct answer is 2 15 \ a \ +\ 25 = 55 15 \ a = 55 \ -\ 25 15 \ a = 30 a = 2
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35- Choice B is correct
The correct answer is 72 There are equal numbers of four types of cards. Therefore, the total number of cards must be divisible by 4. Only choice C (72) is divisible by 4.
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36- Choice A is correct
The correct answer is 65 All angles in a triangle sum up to 180 degrees. Two angles of a triangle measure 40 and 75. 40 \ + \ 75 = 115 Then, the third angle is: 180 \ – \ 115 =65
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37- Choice B is correct
The correct answer is \frac{7}{21} There are equal From the choice provided, only choice B is not equal to \frac{3}{5}. \frac{7}{21} = \frac{1}{3}
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38- Choice B is correct
The correct answer is 50 30 seconds is one second of a minute. One second of 100 is 50. 100 \div 2 = 50 Mary types 50 words in 30 seconds.
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38- Choice B is correct
The correct answer is 50 30 seconds is one second of a minute. One second of 100 is 50. 100 \div 2 = 50 Mary types 50 words in 30 seconds.
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39- Choice A is correct
The correct answer is 56 least common multiple (LCM) of 8 and 14 is the smallest number that is divisible by both 8 and 14. LCM = 56
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40- Choice C is correct
The correct answer is 6 Times 8 hour = 480 minutes. Write a proportion and solve. \frac{80}{1} = \frac{480}{x} → x = \frac{480}{80} = 6
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41- Choice A is correct
The correct answer is \frac{13}{5} Find common denominator and solve. \frac{4}{2} \ + \ \frac{3}{5} = \frac{20}{10} \ +\frac{6}{10} = \frac{26}{10}→\frac{13}{5}
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42- Choice C is correct
The correct answer is 12 The factors of 30 are: \left\{ 1, \ 2,\ 3 , \ 5, \ 6 , \ 10, \ 15, \ 30\right\} 12 is not a factor of 30.
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43- Choice D is correct
The correct answer is \frac{6}{7} One method to compare fractions is to convert them to decimals. A. \frac{1}{2} = 0.5 B. \frac{2}{3} = 0.66 C. \frac{4}{5} = 0.8 D. \frac{6}{7} = 0.85 0.85 or \frac{6}{7} is the largest number.
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44- Choice A is correct
The correct answer is 130\% The question is this: 1.50 is what percent of 1.15? Use percent formula: part = \frac{percent}{100} \times whole part = \frac{percent}{100} \times 1.15 ⇒ 1.50 = \frac{percent \ \times 1.15}{100} ⇒ 150 = percent \times 1.15 ⇒ percent = \frac{150}{1.15} = 130
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45- Choice A is correct
The correct answer is 80 cm^2 Area of a triangle = \frac{1}{2} (base)(height) A = \frac{1}{2} \ (20) \ (8) = 80
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46- Choice C is correct
The correct answer is 648 Perimeter = 2 ( width + length) A = width \times length First, find the length of the rectangle. Perimeter = 2 ( width + length) \rightarrow 108= 2 ( 18\ + length) \rightarrow 108 = 36 \ + \ 2 (length) \rightarrow 72= 2 (length) \rightarrow length =36 A = 18 \times 36 =648
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47- Choice A is correct
The correct answer is 7,459.4 Times 7,459.3256 rounded to the nearest tenth is 7,459.4
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48- Choice C is correct
The correct answer is \frac{14}{15} If 14 balls are removed from the bag at random, there will be one ball in the bag. The probability of choosing a red ball is 1 out of 15. Therefore, the probability of not choosing a brown ball is 14 out of 15 and the probability of having not a red ball after removing 14 balls is the same.
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49- Choice C is correct
The correct answer is 3\% The question is this: 650.20 is what percent of 670? Use percent formula: part = \frac{percent}{100} \times whole 650.20 = \frac{percent}{100} \times 670 ⇒ 650.20 = \frac{percent \times 670}{100} ⇒ 65020 = percent \times 670 ⇒ percent = \frac{65020}{670} = 97 650.20 is 97\% of 670. Therefore, the discount is: 100\% \ – \ 97\% = 3\%
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50- Choice D is correct
The correct answer is 76 All angles in a triangle add up to 180 degrees. 68 \ +\ 36 = 104 180 \ –\ 104 = 76
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51- Choice A is correct
The correct answer is 4.5\% 0.045 \times 100 = 4.5\%
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52- Choice C is correct
The correct answer is 3 Hours Since Mary running at 4 miles per hour and Mary is running at the speed of 7 miles per hour, each hour their distance decreases by 3 mile. So, it takes 15 hours to cover distance of 9 miles. 9 \div 3 = 3
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53- Choice B is correct
The correct answer is 360 Since Susan gives 6 pieces of candy to each of her friends, then, then number of pieces of candies must be divisible by 6. A. 214 \div 6 = 35.66 B. 360 \div 6 = 60 C. 325 \div 6 = 54.16 D. 157\div 6 = 26.16 Only choice B (360) gives a whole number.
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54- Choice A is correct
The correct answer is \frac{5}{1000} \frac{5}{1000} = 0.005
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55- Choice C is correct
The correct answer is $32 $8 \times 8 = $64 Petrol use: 8 \times 2 = 16 liters Petrol cost: 16 \times $2 = $32 Money earned: $64 \ - \ $32 = $32
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56- Choice A is correct
The correct answer is 1500 m^3 If the length of the box is 30, then the width of the box is one third of it, 10, and the height of the box is 5 (one second of the width). The volume of the box is: V = (length)(width)(height) = (30) \ (10) \ (5) = 1500 m^3
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57- Choice C is correct
The correct answer is 13 \ hr. \ \ 47 \ min
\cfrac{\begin{align} 37 \ hr. \ \ 25 \ min \\ - \ 23 \ hr. \ \ 38 \ min \end{align}}{} 13 \ hr. \ \ 47 \ min
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58- Choice C is correct
The correct answer is 5 Let x be the number of raptors Daniel saw on Monday. Then: Mean = \frac{x \ + \ 7 \ + \ 18 \ + \ 11 \ + \ 9}{5} = 10 → x \ + \ 45 = 50 → x = 50 \ – \ 45 = 5
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59- Choice A is correct
The correct answer is 80\% The failing rate is 25 out of 125 = \frac{25}{125} Change the fraction to percent: \frac{25}{125} \times 100\% = 20\% 20 percent of students failed. Therefore, 80 percent of students passed the exam.
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60- Choice C is correct
The correct answer is 135^{◦} An obtuse angle is an angle of greater than 90 degrees and less than 180 degrees. Only choice C (135 degrees) is an obtuse angle
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61- Choice A is correct
The correct answer is \frac{3}{4} There are 8 squares and 6 of them are shaded. Therefore, 6 out of 8 or \frac{6}{8} = \frac{3}{4} are shaded.
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62- Choice A is correct
The correct answer is (300)(0.75)(0.85) To find the discount, multiply the number by (100\% \ – rate of discount). Therefore, for the first discount we get: (300)(100\% \ – \ 25\%) = (300)(0.75) For the next 15\% discount: (300)(0.75)(0.85)
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63- Choice A is correct
The correct answer is A \times \ 2 = 28 Plug in 14 for A in the equation. Only choice A works. A \times \ 2 = 28 14 \ \times \ 2 = 28
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64- Choice C is correct
The correct answer is 75 Write a proportion and solve. \frac{3}{5} = \frac{x}{45} Use cross multiplication: 3 \ x = 225 → x =75
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65- Choice D is correct
The correct answer is trapezoid A quadrilateral with one pair of parallel sides is a trapezoid.
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66- Choice A is correct
The correct answer is $19.5 1 hour: $3.25 6 hours: 6 \times $3.25 = $19.5
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67- Choice B is correct
The correct answer is 96 1 pizza has 8 slices. 12 pizzas contain (12 \times 8) \ 96 slices.
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68- Choice C is correct
The correct answer is 62.5\% There are 40 students in the class. 15 of the are male and 25 of them are female. 25 out of 40 are female. Then: \frac{25}{40} = \frac{x}{100} → 2,500 = 40 \ x → x=2,500\div 40 =62.5 \%
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