1- Choice B is correct
The correct answer is 36% 50 – 32=18 male students 1850=0.36 Change 0.36 to percent ⇒0.36 × 100=36%
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2- Choice A is correct
The correct answer is 8640 3 weeks = 18 days Then: 18 × 8=144 hours 144 × 60=8,640 minutes
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3- Choice D is correct
The correct answer is 54 Cathrine’s three best times are 52 , 53, and 57. The average of these numbers is: average=sumtotal Sum =52 + 53 + 75=162 Total number of numbers = 3 average=1623=54
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4- Choice A is correct
The correct answer is 1200 minutes distance=speed ×time ⇒time=distancespeed=400 + 40040=20 (Round trip means that the distance is 800 miles) The round trip takes 20 hours. Change hours to minutes, then: 20 × 60=1200
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5- Choice C is correct
The correct answer is 144 square feet The area of a 12 feet x 12 feet room is 144square feet. 12 × 12=144
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6- Choice A is correct
The correct answer is 18.83 average=sumtotal Sum = 5 + 8 + 18 + 20 + 30 + 32=113 Total number of numbers = 6 1136=18.83
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7- Choice D is correct
The correct answer is 14 The factors of 40 are: 1 , 2 , 4 , 10 , 20 ,40 14 is not a factor of 40.
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8- Choice B is correct
The correct answer is 9 Emma = Lucy Emma = 3 Mike ⇒Lucy = 3 Mike Lucy = Mike + 18 then: Lucy = Mike + 18 ⇒3 Mike = Mike + 18 Remove 1 Mike from both sides of the equation. Then: 2 Mike = 18⇒ Mike =9
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9- Choice D is correct
The correct answer is 100 1.295432 × 100=129.5432
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10- Choice A is correct
The correct answer is $ 37.1 an hour 6 percent of 35 is: 35 ×6100=2.1 Emily’s new rate is 37.1. 35 + 2.1=37.1
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11- Choice D is correct
The correct answer is 42 Let’s review the choices provided and find their sum. 22 × 4=88 25 × 4=100 32 × 4=128 42 × 4=168⇒is greater than 150 and less than 170 Only choice d gives a number that is greater than 150 and less than 170.
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12- Choice A is correct
The correct answer is 4,200 minutes 14 days 14 × 5=70 hours 70 × 60=4,200 minutes
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13- Choice B is correct
The correct answer is 120 hours 1 hour20 coffees=x2400 ⇒20 × x=1 × 2,400⇒20 x=2,400 x=120 It takes 120 hours until she’s made 2,400 coffees.
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14- Choice A is correct
The correct answer is 22.5 Sum =18 + 24 + 12 + 36=90 average=904=22.5
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15- Choice C is correct
The correct answer is 55 miles Speed = distancetime 15.2=distance3.6 ⇒ distance =15.2 × 3.6=54.72 Rounded to a whole number, the answer is 55.
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16- Choice B is correct
The correct answer is 240 yards Perimeter of a rectangle =2 ×length + 2 ×width = 2 × 80 + 2 × 40=160 + 80=240
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17- Choice A is correct
The correct answer is 8 quarters Two candy bars costs 90 ¢ and a package of peanuts cost 65 ¢ and a can of cola costs 45 ¢. The total cost is: 90 + 65 + 45=200 200 is equal to 8 quarters. 8 × 25=200
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18- Choice C is correct
The correct answer is 48 √64 ×√36=8 × 6=48
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19- Choice D is correct
The correct answer 31 132 – 8=124 1244=31
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20- Choice A is correct
The correct answer is 13 miles Write a proportion and solve. 12inches6.5=1 milex Use cross multiplication, then: 12 x=6.5→x=13
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21- Choice C is correct
The correct answer is 4.54% percent of change=changeoriginal number 5.75 – 5.50=0.25 percent of change=0.255.50=0.0454⇒0.0454 × 100=4.54%
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22- Choice A is correct
The correct answer is 10 Every day the hour hand of a watch makes 2 complete rotation. (36030=12 ⇒ a complete rotation takes 12 hour, 2412=2) Thus, it makes 10 complete rotations in 5 days. 2 × 5=10
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23- Choice D is correct
The correct answer is 0.45% To convert a decimal to percent, multiply it by 100 and then add the percent sign (%). 0.0045 × 100=0.45%
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24- Choice A is correct
The correct answer is 735,616 The difference of the file added, and the file deleted is: 325,159 – 312,671=12488 723,128 + 12,488=735,616
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25- Choice C is correct
The correct answer is $ 46.8 25% × 60=25100 × 60=15 The coupon has $ 15 value. Then, the selling price of the sweater is $ 45. 60 – 15=45 Add 4% tax, then: 4100 × 45=1.8 for tax then: 45 + 1.8=$ 46.8
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26- Choice B is correct
The correct answer is 3,360 minutes 2 Weeks =14 Days 4 hours ×14 Days =56 hours 56 hours =3,360 minutes
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27- Choice A is correct
The correct answer is 2 weeks 1 quart =0.25 gallon 24 quarts =24 × 0.25=6 gallons then: 63=2 weeks
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28- Choice C is correct
The correct answer is − 2 6 y + 5 y + 4 y=− 30⇒15 y=− 30⇒ y=− 2
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29- Choice A is correct
The correct answer is 3 332 − 124=364 − 124=184 −64=124=3
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30- Choice A is correct
The correct answer is 7 210 ÷ 30=7
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31- Choice D is correct
The correct answer is 35 From the choices provided, 10 , 20 and 35 are divisible by 5. From these numbers, 35 is the biggest.
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32- Choice A is correct
The correct answer is x2 + 7 x + 12 Use FOIL (First, Out, In, Last) method. (x + 4) (x + 3)=x2 + 3 x + 4 x + 12=x2 + 7 x + 12
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33- Choice A is correct
The correct answer is 4 Oven 1 = 3 oven 2 If Oven 2 burns 4 then oven 1 burns 12 pizzas. 4 + 12=16
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34- Choice C is correct
The correct answer is 4.2 × 105 In scientific notation form, numbers are written with one whole number times 10 to the power of a whole number. Number 420,000 has 6 digits. Write the number and after the first digit put the decimal point. Then, multiply the number by 10 to the power of 5 (number of remaining digits). Then: 420,000=4.2 × 105
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35- Choice A is correct
The correct answer is 125∘ An obtuse angle is an angle greater than 90∘ and less than 180∘.
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36- Choice C is correct
The correct answer is 45 Perimeter of a triangle = side 1+ side 2+ side 3=15 + 15 + 15=45
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37- Choice A is correct
The correct answer is 59 Use exponent multiplication rule: xa . xb=xa + b Then: 53 × 56=59
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38- Choice C is correct
The correct answer is 113.04 Diameter =12 then: Radius =6 Area of a circle =π r2 ⇒ A =3.14 (6)2=113.04
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39- Choice C is correct
The correct answer is 6589.5 6589.49235 rounded to the nearest tenth equals 6589.5 (Because 6589.49 is closer to 6,589.5 than 6,589.4)
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40- Choice A is correct
The correct answer is 5 × 4 ×3 ×2 × 1 5!=5 × 4 × 3 × 2 × 1
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41- Choice C is correct
The correct answer is 8 3√512=8
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42- Choice A is correct
The correct answer is (1 , 2) Let’s review the choices provided. Put the values of x and y in the equation. (1 , 2)⇒x=1⇒y=4 This is not true! (2 , 10)⇒x=2⇒y=10 This is true! (− 1 , − 8)⇒x=− 1⇒y=− 8 This is true (3 , 16)⇒x=3⇒y=16 This is true!
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43- Choice A is correct
The correct answer is 25,200 square feet Area of a rectangle = width × length =120 × 210=25,200
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44- Choice A is correct
The correct answer is 5 Use distance formula: d=√(x1 − x2)2 + (y1 − y2)2=√(1 − (− 2))2 + (3 − 7)2 √9 + 16=√25=5
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45- Choice D is correct
The correct answer is 10000 Number 3.356452 should be multiplied by 10,000 in order to obtain the number 33,564.52 3.356452 × 10,000=33,564.52
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46- Choice B is correct
The correct answer is 49 From the list of numbers 7 , 11, and 31 are prime numbers. Their sum is: 7 + 11 + 31=49
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47- Choice A is correct
The correct answer is 52 Let’s review the choices provided. 40 × 5=200 52 × 5=260 70 × 5=350 68 × 5=340 From choices provided, only 260 is greater than 240 and less than 320.
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48- Choice A is correct
The correct answer is 12 50%=50100=12
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49- Choice C is correct
The correct answer is 36 The cube of 6=6 × 6 × 6=216 16 × 216=36
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50- Choice A is correct
The correct answer is 36 x8 4 (3 x4)2⇒4 × 32 × x8=36 x8
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51- Choice D is correct
The coorect answer is 120∘ Two Angles are supplementary when they add up to 180 degrees. 120∘ + 60∘=180∘
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52- Choice D is correct
The correct answer is 64 factor of 24=1 , 2 , 3 , 4 , 6 , 8 , 12 , 24 64 is not a factor of 24.
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53- Choice D is correct
The correct answer is 11 2 – (– 9)=2 + 9=11
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54- Choice A is correct
The correct answer is 18 30100 × 60=18
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55- Choice B is correct
The correct answer is 8 x2 – 64=0⇒x2=64⇒x could be 8 or – 8.
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