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Lintel Sep 9 - 15 25 questions
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Monday 9 September 2013

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Write 45,000,000 in standard form

    Answer: 4.5 × 107
  2. 2. Algebra

    Factorise: x² - x - 20

    Answer: (x + 4)(x - 5)
  3. 3. Geometry

    Hypotenuse = 39cm, angle = 61°. Find adjacent side. Give your answer to 2 decimal places

    Answer: 18.91cm
  4. 4. Ratio

    Divide 162 in the ratio 4:4:1

    Answer: 72, 72 and 18
  5. 5. Statistics

    The mean of 6 numbers is 34. If 5 of them are 43, 21, 36, 40, 50, what is the missing number?

    Answer: 14

Tuesday 10 September 2013

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Write 5,700,000 in standard form

    Answer: 5.7 × 106
  2. 2. Algebra

    Factorise: x² - x - 6

    Answer: (x + 2)(x - 3)
  3. 3. Geometry

    Adjacent = 30cm, angle = 38°. Find opposite. Give your answer to 2 decimal places

    Answer: 23.44cm
  4. 4. Ratio

    Simplify: 8:4:10

    Answer: 4:2:5
  5. 5. Statistics

    The mean of 4 numbers is 32. If 3 of them are 20, 21, 39, what is the missing number?

    Answer: 48

Wednesday 11 September 2013

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Write 0.00046 in standard form

    Answer: 4.6 × 10-4
  2. 2. Algebra

    Factorise: x² - 4x - 60

    Answer: (x + 6)(x - 10)
  3. 3. Geometry

    Hypotenuse = 38cm, angle = 58°. Find adjacent side. Give your answer to 2 decimal places

    Answer: 20.14cm
  4. 4. Ratio

    Divide 176 in the ratio 4:3:1

    Answer: 88, 66 and 22
  5. 5. Statistics

    Calculate the mean of: 32, 50, 36, 32, 13, 18. Give your answer to 2 decimal places

    Answer: 30.17

Thursday 12 September 2013

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Write 120,000,000 in standard form

    Answer: 1.2 × 108
  2. 2. Algebra

    Factorise: x² + x - 110

    Answer: (x + 11)(x - 10)
  3. 3. Geometry

    Adjacent = 17cm, angle = 53°. Find opposite. Give your answer to 2 decimal places

    Answer: 22.56cm
  4. 4. Ratio

    Express the first part of 5:11 as a fraction in simplest form

    Answer: 5⁄16
  5. 5. Statistics

    Calculate the mean of: 5, 25, 44, 49, 30, 8, 41, 18

    Answer: 27.5

Friday 13 September 2013

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Write 0.036 in standard form

    Answer: 3.6 × 10-2
  2. 2. Algebra

    Factorise: x² - 5x - 6

    Answer: (x + 1)(x - 6)
  3. 3. Geometry

    Hypotenuse = 27cm, angle = 50°. Find adjacent side. Give your answer to 2 decimal places

    Answer: 17.36cm
  4. 4. Ratio

    Divide 117 in the ratio 3:4:2

    Answer: 39, 52 and 26
  5. 5. Statistics

    The mean of 5 numbers is 28. If 4 of them are 33, 29, 42, 19, what is the missing number?

    Answer: 17