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 \(3\).
