Rates And Ratios Pretest

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| By C_mcgarry
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C_mcgarry
Community Contributor
Quizzes Created: 1 | Total Attempts: 151
Questions: 10 | Attempts: 151

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Rates And Ratios Pretest - Quiz


Answer these questions as well as you can.


Questions and Answers
  • 1. 

    Convert 3.6km to m.

    Explanation
    To convert kilometers to meters, you need to multiply the value by 1000. In this case, 3.6 kilometers multiplied by 1000 equals 3600 meters. Therefore, the correct answer is 3600m.

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  • 2. 

     2 1/7 as an improper fraction is 23/7

    • A.

      True

    • B.

      False

    Correct Answer
    B. False
    Explanation
    The given statement is false. To convert a mixed number to an improper fraction, we multiply the whole number by the denominator of the fraction and add the numerator. In this case, 2 multiplied by 7 is 14, and adding 1 gives us 15. So, 2 1/7 as an improper fraction is 15/7, not 23/7.

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  • 3. 

    0.52517 rounded to 2 decimal places is:

    • A.

      0.53

    • B.

      0.52

    Correct Answer
    A. 0.53
    Explanation
    The number 0.52517, when rounded to 2 decimal places, would be 0.53. This is because the digit in the third decimal place, 5, is greater than or equal to 5, so it causes the digit in the second decimal place, 2, to be rounded up to 3.

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  • 4. 

    Simplify the following: 36/48

    • A.

      18/24

    • B.

      9/12

    • C.

      3/4

    Correct Answer
    C. 3/4
    Explanation
    The given expression can be simplified by dividing both the numerator and denominator by their greatest common divisor, which in this case is 12. Simplifying each fraction step by step, we get 36/48 = 3/4. Therefore, the answer is 3/4.

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  • 5. 

    Convert 2000mm to cm

    • A.

      20cm

    • B.

      200cm

    • C.

      2cm

    • D.

      2m

    Correct Answer
    B. 200cm
    Explanation
    To convert mm to cm, we need to divide the value in mm by 10. In this case, we have 2000mm, so dividing it by 10 gives us 200cm. Therefore, the correct answer is 200cm.

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  • 6. 

    3.899 rounded to 2 decimal places is _____

    Correct Answer
    3.90
    3.9
    Explanation
    When rounding a number to 2 decimal places, we look at the digit in the third decimal place. If this digit is 5 or greater, we round up the second decimal place, and if it is less than 5, we leave the second decimal place as it is. In this case, the digit in the third decimal place is 9, which is greater than 5. Therefore, we round up the second decimal place to 0, resulting in 3.90. Additionally, 3.9 is also a valid answer as it is the rounded version of 3.899 to 1 decimal place.

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  • 7. 

    If 2/3 = 8/x, what is x?

    Correct Answer
    12
    Explanation
    The given equation states that the fraction 2/3 is equal to 8 divided by x. To find the value of x, we can cross multiply. By multiplying 2 and x, we get 2x, and by multiplying 3 and 8, we get 24. Therefore, the equation becomes 2x = 24. To isolate x, we divide both sides of the equation by 2, resulting in x = 12. Hence, the value of x is 12.

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  • 8. 

    If x/2 = 21/6, what is x?

    • A.

      3

    • B.

      1

    • C.

      7

    Correct Answer
    C. 7
    Explanation
    The equation x/2 = 21/6 can be simplified by multiplying both sides by 2, resulting in x = 21/3. Simplifying further, we find that x equals 7.

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  • 9. 

    30% of 150 is ______

    Correct Answer
    45
    Explanation
    To find 30% of a number, we multiply the number by 0.30. In this case, 30% of 150 is calculated as 150 * 0.30 = 45. Therefore, the answer is 45.

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  • Current Version
  • Apr 24, 2024
    Quiz Edited by
    ProProfs Editorial Team
  • May 21, 2012
    Quiz Created by
    C_mcgarry
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