1- Choice B is correct
The correct answer is 38 The sum of numbers divided by 7 give the average of numbers. Then: \frac{210}{7} \ < \ x \ < \ \frac{280}{7} 30 \ < \ x \ < \ 40 From choices provided, only 38 is correct.
|
2- Choice C is correct
The correct answer is 81 3^4 = 3 \times 3 \times 3 \times 3 =81
|
3- Choice A is correct
The correct answer is 32 Use PEMDAS (order of operation): - \ 20 \ + \ 5 \times (– \ 4) \ – \ \left[ \ 6 \ + \ 25 \ \times (- \ 6) \ \right] \div 2 = - \ 20 \ -\ 20 \ - \ \left[\ 6 \ - \ 150 \ \right] \div 2 = - \ 40 \ - \ \left[ \ - \ 144 \ \right] \div 2 = - \ 40 \ + \ 144 \div 2 = - \ 40 \ + \ 72 = 32
|
4- Choice D is correct
The correct answer is \frac{5}{3} A. \frac{4}{5} = 0.8 B. \frac{3}{2} = 1.5 C. \frac{7}{9} = 0.77 D. \frac{5}{3} = 1.66
|
5- Choice A is correct
The correct answer is 200 50 \times 4 = 200
|
6- Choice C is correct
The correct answer is 13 The difference of each number and the next number is 4. \left\{29, \ 25, \ 21, \ 17, \ 13\right\}
|
7- Choice D is correct
The correct answer is 9 15 \ a \ + \ 25 = 160 → 15 \ a = 160 \ - \ 25 → 15 \ a = 135 → a = 9
|
8- Choice C is correct
The correct answer is 84 A. \frac{52}{7} = 7.42 B. \frac{32}{7} = 4.57 C. \frac{84}{7} = 12 D. \frac{13}{7} =1.85
|
9- Choice B is correct
The correct answer is 56 The smallest number that is divisible by both 8 and 14 is 56. LCM = 56
|
10- Choice A is correct
The correct answer is 90 15 \times 6 = 90
|
11- Choice C is correct
The correct answer is 18 Each worker can walk 3 dogs: 12 \div 4 = 3 6 workers can walk 18 dogs. 6 \times 3 = 18
|
12- Choice C is correct
The correct answer is approximately 42 hours Speed = \frac{distance }{time} 60 = \frac{2,500 }{time} → time = \frac{2,500 }{60} = 41.66
|
13- Choice B is correct
The correct answer is 3 The factors of 21 are: \left\{ 1, \ 3, 7 \ , \ 21\right\} The factors of 30 are: \left\{ 1, \ 2,\ 3 , \ 4 , \ 5 , \ 6 , \ 10 \ , \ 15, \ 30\right\} GCF = 3
|
14- Choice B is correct
The correct answer is 75 25 \div \frac{1}{3} = 75
|
15- Choice B is correct
The correct answer is 2 The factors of 12 are: \left\{1, \ 2, \ 3, \ 4, \ 6, \ 12\right\} The factors of 18 are: \left\{1, \ 2, \ 3, \ 6, 9 ,\ 18\right\} The factors of 32 are: \left\{1, \ 2, \ 4, 8 ,16 , \ 32\right\} GCF = 2
|
16- Choice D is correct
The correct answer is 30 Write a proportion and solve. \frac{5}{25} = \frac{x}{150} → x = \frac{5 \times 150}{25} = 30
|
17- Choice A is correct
The correct answer is 5 Ashly = Billy, Ashly = 4 (Kevin) Billy = 15 \ + Kevin Ashly = Billy → Ashly = 15 \ + Kevin Ashly = 4 (Kevin) → 4 (Kevin) = 15 \ + Kevin → 4 (Kevin) – Kevin = 15 3 (Kevin) = 15, Kevin = 5
|
18- Choice C is correct
The correct answer is 256 \frac{4^5}{4} = 4^4 = 256
|
19- Choice B is correct
The correct answer is 21 A. \frac{12}{6} = 2 B. \frac{21}{6} = 3.5 C. \frac{36}{6} = 6 D. \frac{24}{6} = 4
|
20- Choice C is correct
The correct answer is p^5 (p^2) \ . \ (p^3) = p^{2 \ +\ 3} = p^5
|
21- Choice C is correct
The correct answer is 13 A. 9 → 9 is not prime. It is divisible by 3. B. 6 → 6 is not prime. It is divisible by 2. C. 13 → 13 is prime! D. 45 → 45 is not prime. It is divisible by 3.
|
22- Choice B is correct
The correct answer is 2 6 \ a \ – \ 3 = 9 6 \ a = 9 \ + \ 3 6 \ a = 12 a = 2
|
23- Choice C is correct
The correct answer is 9 feet \frac{(15 \ feet \ + \ 7 \ yards) }{4} = \frac{(15 \ feet \ + \ 21 \ feet ) }{4} = \frac{(36 \ feet ) }{4} = 9 feet
|
24- Choice A is correct
The correct answer is 0 (5.2 \ + \ 3.3 \ + \ 2.5) \ x = x 11 \ x = x Then x = 0
|
25- Choice C is correct
The correct answer is 2 \ (X \ - \ 7) A \ + \ B = X A \ + \ 7 = X A = X \ -\ 7 2 \ A = 2 \ (X \ - \ 7)
|
26- Choice B is correct
The correct answer is > 0.325 is bigger than 0.0452. 0.325 \ > \ 0.0452
|
27- Choice C is correct
The correct answer is 26 Susy = Mary + \ 8 Mary = Jimmy – \ 4 → Jimmy = Mary + \ 4 Jimmy + Mary + Sylvia = 90 (Mary + \ 4) \ + Mary + (Mary + \ 8) = 90 3 Mary + \ 12 = 90 3 Mary = 78, Mary = 26
|
28- Choice D is correct
The correct answer is 5 Times 5 hours = 300 minutes \frac{60}{1} = \frac{300}{x} → x = \frac{300}{60} = 5
|
29- Choice A is correct
The correct answer is 18.84 Diameter = 6, then: Radius = 3 C = 2 \ π \ r , C = 6 \ π → C = 18.84
|
30- Choice C is correct
The correct answer is < 0.632 is bigger than 0.0540. 0.524 \ < \ 0.0234
|
31- Choice A is correct
The correct answer is \frac{3}{4} \frac{1}{x} = \frac{\frac{1}{1}}{\frac{4}{3}} = \frac{3}{4}
|
32- Choice C is correct
The correct answer is 16 The factors of 40 are: \left\{ 1, \ 2, \ 4 , \ 5, \ 8 , \ 10, 20 , \ 40\right\}
|
33- Choice A is correct
The correct answer is 5.5\% 0.055 \times 100 = 5.5\%
|
34- Choice B is correct
The correct answer is 6,598.5 The number in the tenth place is 4. The number 6,598.44 is closer to 6,598.5 than 6,598.4
|
35- Choice C is correct
The correct answer is thousandths 3 is in the thousandths place.
|
36- Choice C is correct
The correct answer is \frac{3}{4} \frac{15}{20} = \frac{3}{4}
|
37- Choice D is correct
The correct answer is 9 - \ 3 \ + \ 9 = 6
|
38- Choice C is correct
The correct answer is 0.36 \frac{8}{22} = 0.36
|
39- Choice B is correct
The correct answer is 5 \sqrt{25} = 5
|
40- Choice A is correct
The correct answer is 81 a^a \ . \ a = (3)^3 \ . \ 3 = 27\ . \ 3 =81
|
41- Choice C is correct
The correct answer is 7.5 4.5 \ < \ x \ ≤ \ 7.0, then cannot be equal to 7.5
|
42- Choice C is correct
The correct answer is 3 9 \ + \ 3 \ x \ ≤ \ 18 3 \ x \ ≤ \ 18 \ – \ 9 3 \ x \ ≤ \ 9 x \ ≤ \ 3
|
43- Choice A is correct
The correct answer is 1 \ \frac{1}{2} The reduced fraction equal to 1.5 is 1 \ \frac{1}{2}
|
44- Choice C is correct
The correct answer is 0.4 \frac{2}{5} = 0.4
|
45- Choice D is correct
The correct answer is 159 inches 1 feet = 12 inches 5 feet, 5 inches =65 inches 7 feet, 10 inches = 94 inches 65 \ + \ 94 =159 inches
|
46- Choice A is correct
The correct answer is 18 50 \ – \ 32 =18
|
47- Choice A is correct
The correct answer is 2 \frac{1}{6} \ + \ \frac{1}{3} \ + \ \frac{3}{2} = \frac{1 \ + \ 2 \ + \ 9}{6} = \frac{12}{6} =2
|
48- Choice D is correct
The correct answer is 58 72 \ – \ 14 = 58
|
49- Choice C is correct
The correct answer is 2 Write a proportion and solve. \frac{8}{20} = \frac{x}{5} → x = \frac{8 \times 5}{20} = 2
|
50- Choice A is correct
The correct answer is 1 \ \frac{3}{10} Miles \frac{1}{5} of the distance is 6 \ \frac{1}{2} miles. Then: \frac{1}{5} \times 6 \ \frac{1}{2} = \frac{1}{5} \times \frac{13}{2} = \frac{13}{10} Converting \frac{13}{10} to a mixed number gives: \frac{13}{10} = 1 \ \frac{3}{10}
|
51- Choice A is correct
The correct answer is 90 3 lab = 3 \ (3) \ (2) \ (5) =90
|
52- Choice B is correct
The correct answer is 6^{3} 6 \times 6 \times 6 = 6^{3}
|
53- Choice C is correct
The correct answer is \frac{5}{6} 2 \ \frac{2}{3} \ − \ 1 \ \frac{5}{6} = 2 \ \frac{4}{6} \ − \ 1 \ \frac{5}{6} = \frac{16}{6} \ − \ \frac{11}{6} = \frac{5}{6}
|
54- Choice D is correct
The correct answer is $32 Use interest rate formula: Interest = principal \times rate \times time = 800 \times 0.04 \times 1= 32
|
55- Choice C is correct
The correct answer is 16 years old Cristina = 32 Cristina = 2 Ashly Ashly = \frac{32}{2} = 16
|
56- Choice C is correct
The correct answer is 135 degrees Angle x and angle 45 degrees are supplementary angles. Then: 180^{◦} \ – \ 45^{◦} = 135^{◦} x = 135^{◦}
|
57- Choice C is correct
The correct answer is 6,864 312 \times 22 = 6,864
|
58- Choice A is correct
The correct answer is 77 cm^2 A = \frac{1}{2} \ b \ h A = \frac{1}{2} \ (22) \ (7) = 77
|
59- Choice D is correct
The correct answer is 720 6! = 6 \times 5 \times \ 4 \times 3 \times 2 \times 1 = 720
|
60- Choice A is correct
The correct answer is 1 \times 2 \times 3 \times 4 \times 5 5! = 5 \times 4 \times 3 \times 2 \times 1
|
61- Choice A is correct
The correct answer is \frac{2}{100} \frac{2}{100} = 0.02
|
62- Choice D is correct
The correct answer is 3 Oven 1 = 3 oven 2 If Oven 2 burns 3 then oven 1 burns 9 pizzas. 3 \ + \ 9 = 12
|
63- Choice A is correct
The correct answer is \frac{1}{6} 6 children, 1 liter of orange juice Then each child gets \frac{1}{6} of litter.
|
64- Choice C is correct
The correct answer is 11 A. 12 → 12 is not prime. It is divisible by 2. B. 8 → 8 is not prime. It is divisible by 2. C. 17 → 17 is prime! D. 33 → 33 is not prime. It is divisible by 3.
|