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5-a-day: Monday, November 2

Grades 9 and 10 (Years 10 and 11 (GCSE) in England)

Name

Date

Score/ 5

  1. Question 1

    A measurement is 137 cm, correct to the nearest whole number. What is the lower bound?

    Answer

  2. Question 2

    (x + 7) : (2x − 2) = 5 : 2. Find x.

    x =

  3. Question 3

    A 8 m ladder leans against a wall at 33° to the ground. To find how high up the wall it reaches, which ratio do you use with the 33° angle?

    • A. sin
    • B. cos
    • C. tan

  4. Question 4

    Is 4a + 4b parallel to 2a + 2b?

    • A. Yes
    • B. No

  5. Question 5

    A car worth $8000 loses 15% of its value each year. What is it worth after 4 years? Round to the nearest whole number (type the number only).

    Answer

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Answer key: 5-a-day: Monday, November 2

  1. 1. 136.5

    • 137 − 0.5 = 136.5

  2. 2. x = 3

    • 2(x + 7) = 5(2x − 2)
    • 2x + 14 = 10x − 10
    • −8x = −24
    • x = 3

  3. 3. sin

    • sin 33° = h/8
    • sin

  4. 4. Yes

    • 4 ÷ 2 = 2; 4 ÷ 2 = 2
    • Yes

  5. 5. 4176

    • 8000 × 0.85⁴ = 4176.05
    • ≈ 4176