End-Term Math Review
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Questions and Answers

Which of the following statements is true about integers?

  • Integers are only whole numbers above zero.
  • Integers are always greater than zero.
  • Integers can be fractions.
  • Integers include both positive and negative numbers. (correct)
  • What is the opposite of -95?

  • -5
  • -95
  • 0
  • 95 (correct)
  • When subtracting a negative integer, what is the correct method to use?

  • Change the first number to its opposite and subtract.
  • Subtract the absolute value of both numbers.
  • Add the two numbers together.
  • Change subtraction to addition and the second number to its opposite. (correct)
  • Which of the following pairs of integers would yield a positive product when multiplied?

    <p>-4 and -6</p> Signup and view all the answers

    What is the lowest common multiple (LCM) of 4 and 6?

    <p>12</p> Signup and view all the answers

    If the sum of -3 and -5 equals -8, what is true about adding two negative integers?

    <p>The result is negative.</p> Signup and view all the answers

    When two integers have the same sign and are added together, what is the sign of the result?

    <p>Positive</p> Signup and view all the answers

    What is the absolute value of -17?

    <p>17</p> Signup and view all the answers

    Which of the following numbers is NOT a prime number?

    <p>15</p> Signup and view all the answers

    What is the numerator in the fraction that represents 18 girls out of 30 students?

    <p>18</p> Signup and view all the answers

    Which step is necessary to simplify the fraction 18/30?

    <p>Divide both the numerator and denominator by the HCF.</p> Signup and view all the answers

    When adding fractions with different denominators, which of the following must be done first?

    <p>Find a common denominator.</p> Signup and view all the answers

    What are the first nine prime numbers?

    <p>2, 3, 5, 7, 11, 13, 17, 19, 23</p> Signup and view all the answers

    Which action is performed when multiplying fractions?

    <p>Multiply the numerators together and multiply the denominators together.</p> Signup and view all the answers

    What should you do if the denominators of the fractions you are adding are different?

    <p>Find a common denominator before adding.</p> Signup and view all the answers

    What do you call the numbers that exactly divide another number?

    <p>Prime factors</p> Signup and view all the answers

    What fraction of students are girls if 70% of the students are boys?

    <p>0.3</p> Signup and view all the answers

    How do you express 3/7 as a decimal rounded to two decimal places?

    <p>0.43</p> Signup and view all the answers

    If the ratio of fish to hamsters is 25:95, what is the simplified ratio?

    <p>5:19</p> Signup and view all the answers

    What is the decimal representation of 0.23 as a percentage?

    <p>23%</p> Signup and view all the answers

    How many candies does Mary have if John and Mary divide 500 candies in the ratio 3:2?

    <p>200 candies</p> Signup and view all the answers

    What percentage change do you get when dividing by 100 and multiplying by a specified percentage?

    <p>Multiply to find the percentage</p> Signup and view all the answers

    What is the total parts of the ratio 12:4:8 when simplified to the highest common factor?

    <p>3</p> Signup and view all the answers

    If 42% of students are boys, what fraction of them are girls?

    <p>58%</p> Signup and view all the answers

    How many minutes are there in an hour and a half?

    <p>90 minutes</p> Signup and view all the answers

    If a flight operates once every hour, how many passengers can travel in 3 hours with a capacity of 200 passengers per flight?

    <p>600 passengers</p> Signup and view all the answers

    During bad weather, if a flight takes 50% longer than the usual time of 1.5 hours, what will be the total duration of the flight?

    <p>2 hours 15 minutes</p> Signup and view all the answers

    What total revenue does the airline receive for a full flight, considering an average ticket price of $24 and full capacity of 200 passengers?

    <p>$4,800</p> Signup and view all the answers

    If flight #1 is at 90% capacity, flight #2 at 75%, and flight #3 at 60%, what total revenue does the airline receive from these flights?

    <p>$10,800</p> Signup and view all the answers

    What is the percentage change in average passenger capacity from weekdays (143) to weekends (188)?

    <p>31.5%</p> Signup and view all the answers

    If a flight operates at 80% capacity, how many passengers will be on the flight if the capacity is 200?

    <p>160 passengers</p> Signup and view all the answers

    If the average capacity on weekdays is 143 and on weekends is 188, how many more passengers can the airline accommodate on weekends?

    <p>40 passengers</p> Signup and view all the answers

    What is the percentage change when the price of a toy decreases from $220 to $80?

    <p>-63%</p> Signup and view all the answers

    If the price of a game increased from $120 to $150, what is the percentage change?

    <p>25%</p> Signup and view all the answers

    To convert from centimeters to meters, you need to move the decimal point to:

    <p>The left</p> Signup and view all the answers

    What does the symbol $\sqrt{}$ represent?

    <p>A square root</p> Signup and view all the answers

    What is the value of $\sqrt{36}$?

    <p>6</p> Signup and view all the answers

    To find the cube root, the symbol $\sqrt[3]{}$ indicates that you are looking for a number that multiplied by itself how many times?

    <p>Three times</p> Signup and view all the answers

    When converting 0.3 kg to grams, what is the correct conversion?

    <p>300g</p> Signup and view all the answers

    What is the result of the calculation $6^3 + 7^3 + 8^3 + 9^3 + 10^3$?

    <p>2800</p> Signup and view all the answers

    What is the first step when dividing fractions?

    <p>Multiply by the reciprocal of the second fraction</p> Signup and view all the answers

    What is the simplified form of $\frac{6}{9} \times \frac{8}{4}$?

    <p>$\frac{4}{3}$</p> Signup and view all the answers

    What is the correct method to convert 0.4 to a percentage?

    <p>Multiply by 100</p> Signup and view all the answers

    What percentage of a shop's 65 markers are not red if 5 are red?

    <p>92%</p> Signup and view all the answers

    Which calculation gives you the simplest form of $\frac{2}{3} \div \frac{1}{5}$?

    <p>$\frac{2 \times 5}{3 \times 1}$</p> Signup and view all the answers

    What is 0.80 expressed as a fraction in simplest form?

    <p>$\frac{4}{5}$</p> Signup and view all the answers

    How would you convert 35% into decimal form?

    <p>Divide by 100</p> Signup and view all the answers

    What is the percentage of chocolate flavored donuts if out of 45 donuts, 10 are chocolate?

    <p>77.78%</p> Signup and view all the answers

    Study Notes

    End-Term Math Review

    • Topics covered include integers, factors, multiples, prime numbers, fractions, decimals, percentages, ratios, percentage change, units of conversions, powers, and roots.

    Integers

    • Integers are whole numbers including positive numbers, negative numbers, and zero.
    • Numbers below zero are called negatives.
    • Numbers above zero are called positives.
    • Examples of integers: -35, 17, -95

    Integer Rules: + and -

    • If signs are the same, the answer has the same sign.
    • If signs are different, the answer takes the sign of the larger number.
    • To subtract, change subtraction to addition and change the second number to its opposite.

    Integer Rules: x and ÷

    • If signs are the same, the answer is positive
    • If signs are different, the answer is negative.

    Integer Rules - Examples

    • -56 - (-9) = -47
    • -8 - (-36) = 28
    • -3 + (-5)= -8
    • 29 + (-7) = 22
    • -9 x (-8) = 72

    Multiples, Factors, and Prime Numbers

    • Multiples are the products of a number and any whole number
    • Factors are numbers that divide exactly into another number
    • Prime numbers have only two factors: 1 and themselves.

    Lowest Common Multiples (LCM)

    • LCM is the smallest multiple shared by two or more numbers.
    • Find the multiples of each number.
    • Identify the smallest multiple shared by all numbers

    Highest Common Factors (HCF)

    • HCF is the largest factor shared by two or more numbers.
    • Find the factors of each number.
    • Identify the largest factor shared by all numbers

    Prime Numbers

    • Prime numbers are greater than 1 and have only two factors: 1 and themselves.
    • List examples: 2, 3, 5, 7, 11, 13, 17, 19, 23
    • Prime factors are prime numbers that divide another number.

    Fractions

    • Fractions represent a part of a whole.
    • The number on top is the numerator, and the number on the bottom is the denominator.

    Fraction Rules: + and -

    • To add or subtract fractions, find a common denominator first.
    • Add or subtract the numerators and keep the denominator the same.

    Fraction Rules: x and ÷

    • To multiply fractions, multiply the numerators together and the denominators together.
    • To divide fractions, reciprocal the second fraction and change the divide to multiply.

    Fraction Examples

    • 8/6 + 7/5 = 61/15
    • 2/6 + 3/4= 13/12
    • 6/9 x 7/8= 42/72= 7/12
    • 2/3 ÷ 3/4= 8/9

    Converting Fractions, Decimals, and Percentages

    • To convert a fraction to a decimal, divide the numerator by the denominator.
    • To convert a decimal to a percentage, multiply by 100.
    • To convert a percentage to a decimal, divide by 100.

    Units and Conversions

    • Metric units are multiples of 10.
    • To convert, move the decimal point to the left or right based on the unit conversion.

    Powers and Roots

    • Powers represent repeated multiplication. The small number is the exponent.
    • Roots represent the inverse of powers.

    Powers and Roots - Examples

    • 92 = 81
    • 53 = 125
    • 24 = 16
    • √64 = 8
    • ∛64 = 4

    Extra Questions

    • These are additional problems designed to further test understanding

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    Description

    This quiz covers essential math concepts including integers, factors, multiples, prime numbers, and operations involving decimals and percentages. Prepare for your end-term exams by testing your knowledge on these foundational topics. Make sure you're comfortable with integer rules, conversion units, and the basics of powers and roots.

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