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Lintel Mar 4 - 10 25 questions
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Monday 4 March 2013

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Write 71,000 in standard form

    Answer: 7.1 × 104
  2. 2. Algebra

    Factorise: x² - 9x + 8

    Answer: (x - 1)(x - 8)
  3. 3. Geometry

    Adjacent = 20cm, angle = 43°. Find opposite. Give your answer to 2 decimal places

    Answer: 18.65cm
  4. 4. Ratio

    Divide 90 in the ratio 2:2:1

    Answer: 36, 36 and 18
  5. 5. Statistics

    The mean of 4 numbers is 34. If 3 of them are 23, 32, 33, what is the missing number?

    Answer: 48

Tuesday 5 March 2013

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Write 0.06 in standard form

    Answer: 6 × 10-2
  2. 2. Algebra

    Factorise: x² + 7x - 30

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

    Hypotenuse = 18cm, angle = 41°. Find adjacent side. Give your answer to 2 decimal places

    Answer: 13.58cm
  4. 4. Ratio

    Simplify: 4:10:6

    Answer: 2:5:3
  5. 5. Statistics

    Calculate the mean of: 44, 50, 45, 45, 37, 41, 50, 48

    Answer: 45

Wednesday 6 March 2013

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Write 40,000,000 in standard form

    Answer: 4 × 107
  2. 2. Algebra

    Factorise: x² - 5x - 6

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

    Adjacent = 28cm, angle = 34°. Find opposite. Give your answer to 2 decimal places

    Answer: 18.89cm
  4. 4. Ratio

    Black and white sweets are in the ratio 12:9. What fraction of the sweets are white?

    Answer: 3⁄7
  5. 5. Statistics

    Calculate the mean of: 38, 9, 14, 15, 23, 17, 14. Give your answer to 2 decimal places

    Answer: 18.57

Thursday 7 March 2013

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Write 0.041 in standard form

    Answer: 4.1 × 10-2
  2. 2. Algebra

    Factorise: x² - x - 110

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

    Hypotenuse = 30cm, angle = 33°. Find adjacent side. Give your answer to 2 decimal places

    Answer: 25.16cm
  4. 4. Ratio

    Divide 250 in the ratio 3:4:3

    Answer: 75, 100 and 75
  5. 5. Statistics

    The mean of 6 numbers is 36. If 5 of them are 34, 26, 21, 49, 44, what is the missing number?

    Answer: 42

Friday 8 March 2013

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Write 0.0095 in standard form

    Answer: 9.5 × 10-3
  2. 2. Algebra

    Factorise: x² - 22x + 121

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

    Hypotenuse = 17cm, angle = 59°. Find adjacent side. Give your answer to 2 decimal places

    Answer: 8.76cm
  4. 4. Ratio

    Divide 136 in the ratio 3:4:1

    Answer: 51, 68 and 17
  5. 5. Statistics

    The mean of 5 numbers is 36. If 4 of them are 30, 27, 32, 39, what is the missing number?

    Answer: 52