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LevelPraxis Core
SubjectPraxis Core - Mathematics
Year2025 BS
Exam sessionModel questions
Full marks56
Time allowed85 minutes
Questions10, all with step-by-step solutions
A

Core Academic Skills for Educators: Mathematics

Select the best answer.

10 questions·1 mark each
1Multiple choice1 mark

Evaluate the following expression using the correct order of operations:

8+3×(124)2÷68 + 3 \times (12 - 4)^2 \div 6
  • a

    4040

  • b

    3232

  • c

    104104

  • d

    200200

Correct answer: a

4040

Following the order of operations (PEMDAS/BODMAS):

  1. Parentheses: 124=812 - 4 = 8
  2. Exponents: 82=648^2 = 64
  3. Multiplication and Division (left to right): 3×64=1923 \times 64 = 192, then 192÷6=32192 \div 6 = 32
  4. Addition: 8+32=408 + 32 = 40

The value of the expression is 4040.

number-and-quantityorder-of-operations
2Multiple choice1 mark

Convert the fraction 78\dfrac{7}{8} to a decimal and then to a percentage. Which of the following is correct?

  • a

    0.785 and 78.5%0.785 \text{ and } 78.5\%

  • b

    0.875 and 87.5%0.875 \text{ and } 87.5\%

  • c

    0.870 and 87.0%0.870 \text{ and } 87.0\%

  • d

    0.890 and 89.0%0.890 \text{ and } 89.0\%

Correct answer: b

0.875 and 87.5%0.875 \text{ and } 87.5\%

To convert 78\dfrac{7}{8} to a decimal, perform the division:

78=7÷8=0.875.\frac{7}{8} = 7 \div 8 = 0.875.

To convert a decimal to a percentage, multiply by 100100:

0.875×100=87.5%.0.875 \times 100 = 87.5\%.

Therefore 78=0.875=87.5%\dfrac{7}{8} = 0.875 = 87.5\%.

fractionsdecimalsconversions
3Multiple choice1 mark

A car travels 252252 miles using 99 gallons of gasoline. What is the car's fuel efficiency in miles per gallon, and how far can it travel on 1515 gallons at the same rate?

  • a

    28 mpg and 420 miles28 \text{ mpg and } 420 \text{ miles}

  • b

    24 mpg and 360 miles24 \text{ mpg and } 360 \text{ miles}

  • c

    32 mpg and 480 miles32 \text{ mpg and } 480 \text{ miles}

  • d

    28 mpg and 392 miles28 \text{ mpg and } 392 \text{ miles}

Correct answer: a

28 mpg and 420 miles28 \text{ mpg and } 420 \text{ miles}

First, find the unit rate (miles per gallon):

Fuel efficiency=252 miles9 gallons=28 miles per gallon.\text{Fuel efficiency} = \frac{252 \text{ miles}}{9 \text{ gallons}} = 28 \text{ miles per gallon}.

Next, calculate the distance for 1515 gallons:

Distance=28×15=420 miles.\text{Distance} = 28 \times 15 = 420 \text{ miles}.

The car gets 2828 mpg and can travel 420420 miles on 1515 gallons.

ratiosproportionsunit-rate
4Multiple choice1 mark

Solve for xx in the following equation:

5(x3)+2=3(x+1)+45(x - 3) + 2 = 3(x + 1) + 4
  • a

    x=5x = 5

  • b

    x=10x = 10

  • c

    x=8x = 8

  • d

    x=3x = -3

Correct answer: b

x=10x = 10

Expand both sides:

5x15+2=3x+3+45x - 15 + 2 = 3x + 3 + 4 5x13=3x+75x - 13 = 3x + 7

Subtract 3x3x from both sides: 2x13=72x - 13 = 7.

Add 1313 to both sides: 2x=202x = 20.

Divide by 22: x=10x = 10.

Verification: 5(103)+2=5(7)+2=375(10 - 3) + 2 = 5(7) + 2 = 37 and 3(10+1)+4=3(11)+4=373(10 + 1) + 4 = 3(11) + 4 = 37. Both sides equal 3737.

algebralinear-equations
5Multiple choice1 mark

A rectangular garden has a length of 1818 feet and a width of 1212 feet. A walking path 22 feet wide is built around the outside of the garden. What is the total area of the walking path alone?

  • a

    120 sq ft120 \text{ sq ft}

  • b

    136 sq ft136 \text{ sq ft}

  • c

    144 sq ft144 \text{ sq ft}

  • d

    352 sq ft352 \text{ sq ft}

Correct answer: b

136 sq ft136 \text{ sq ft}

The walking path surrounds the garden, so we find the area of the outer rectangle minus the garden.

Outer rectangle dimensions:

  • Length = 18+2(2)=2218 + 2(2) = 22 feet
  • Width = 12+2(2)=1612 + 2(2) = 16 feet

Area of outer rectangle = 22×16=35222 \times 16 = 352 sq ft.

Area of garden = 18×12=21618 \times 12 = 216 sq ft.

Area of walking path = 352216=136352 - 216 = 136 sq ft.

geometryperimeterarea
6Multiple choice1 mark

A recipe calls for 2.52.5 liters of water. If 11 liter equals approximately 33.81433.814 fluid ounces, how many fluid ounces of water are needed? Round to the nearest whole number.

  • a

    8080

  • b

    8585

  • c

    7575

  • d

    9090

Correct answer: b

8585

Multiply the volume in liters by the conversion factor:

2.5 liters×33.814 fl oz/liter=84.535 fl oz.2.5 \text{ liters} \times 33.814 \text{ fl oz/liter} = 84.535 \text{ fl oz}.

Rounded to the nearest whole number: 8585 fluid ounces.

measurementunit-conversions
7Multiple choice1 mark

A school survey recorded the number of books read by students over the summer. The results are as follows:

  • Grade 6: 45 books
  • Grade 7: 62 books
  • Grade 8: 53 books
  • Grade 9: 70 books
  • Grade 10: 58 books

Based on this data, how many more books did Grades 9 and 10 read combined compared to Grades 6 and 7 combined?

  • a

    1515

  • b

    2121

  • c

    2525

  • d

    1818

Correct answer: b

2121

Grades 9 and 10 combined: 70+58=12870 + 58 = 128 books.

Grades 6 and 7 combined: 45+62=10745 + 62 = 107 books.

Difference: 128107=21128 - 107 = 21 books.

Grades 9 and 10 read 2121 more books combined than Grades 6 and 7.

data-interpretationbar-charts
8Multiple choice1 mark

A teacher recorded the following test scores for nine students:

72,  85,  91,  68,  85,  77,  93,  85,  6472, \; 85, \; 91, \; 68, \; 85, \; 77, \; 93, \; 85, \; 64

What are the mean, median, and mode of this data set?

  • a

    Mean=80,Median=85,Mode=85\text{Mean} = 80, \text{Median} = 85, \text{Mode} = 85

  • b

    Mean=82,Median=85,Mode=85\text{Mean} = 82, \text{Median} = 85, \text{Mode} = 85

  • c

    Mean=80,Median=77,Mode=85\text{Mean} = 80, \text{Median} = 77, \text{Mode} = 85

  • d

    Mean=80,Median=85,Mode=91\text{Mean} = 80, \text{Median} = 85, \text{Mode} = 91

Correct answer: a

Mean=80,Median=85,Mode=85\text{Mean} = 80, \text{Median} = 85, \text{Mode} = 85

Mean: Sum all values and divide by the count.

Sum=72+85+91+68+85+77+93+85+64=720\text{Sum} = 72 + 85 + 91 + 68 + 85 + 77 + 93 + 85 + 64 = 720 Mean=7209=80.\text{Mean} = \frac{720}{9} = 80.

Median: Arrange in order: 64,68,72,77,85,85,85,91,9364, 68, 72, 77, 85, 85, 85, 91, 93. With 99 values, the median is the 55th value: 8585.

Mode: 8585 appears 33 times, more than any other value. Mode =85= 85.

Mean =80= 80, Median =85= 85, Mode =85= 85.

statisticsmeanmedianmode
9Multiple choice1 mark

A bag contains 55 red marbles, 33 blue marbles, and 22 green marbles. If one marble is drawn at random, what is the probability that it is either red or green?

  • a

    12\dfrac{1}{2}

  • b

    710\dfrac{7}{10}

  • c

    310\dfrac{3}{10}

  • d

    25\dfrac{2}{5}

Correct answer: b

710\dfrac{7}{10}

Total number of marbles = 5+3+2=105 + 3 + 2 = 10.

The events "red" and "green" are mutually exclusive, so:

P(red or green)=P(red)+P(green)=510+210=710.P(\text{red or green}) = P(\text{red}) + P(\text{green}) = \frac{5}{10} + \frac{2}{10} = \frac{7}{10}.

The probability is 710\dfrac{7}{10} or 0.700.70 or 70%70\%.

probabilitysimple-probability
10Multiple choice1 mark

Consider the following sequence of numbers:

2,  6,  18,  54,  162,  2, \; 6, \; 18, \; 54, \; 162, \; \ldots

What is the 77th term of this sequence?

  • a

    486486

  • b

    972972

  • c

    1,4581{,}458

  • d

    1,9441{,}944

Correct answer: c

1,4581{,}458

Identify the pattern. Each term is obtained by multiplying the previous term by 33:

62=3,186=3,5418=3,16254=3.\frac{6}{2} = 3, \quad \frac{18}{6} = 3, \quad \frac{54}{18} = 3, \quad \frac{162}{54} = 3.

This is a geometric sequence with first term a=2a = 2 and common ratio r=3r = 3.

The nnth term formula is an=arn1a_n = a \cdot r^{n-1}.

a7=2371=236=2729=1,458.a_7 = 2 \cdot 3^{7-1} = 2 \cdot 3^6 = 2 \cdot 729 = 1{,}458.

We can verify: 2,6,18,54,162,486,14582, 6, 18, 54, 162, 486, 1458. The 77th term is 1,4581{,}458.

mathematical-reasoningpattern-recognition

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