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Lintel Dec 26 - Jan 1 25 questions
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Monday 26 December 2011

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Write 710,000,000 in standard form

    Answer: 7.1 × 108
  2. 2. Algebra

    Factorise: x² - 17x + 66

    Answer: (x - 6)(x - 11)
  3. 3. Geometry

    Adjacent = 30cm, angle = 33°. Find opposite. Give your answer to 2 decimal places

    Answer: 19.48cm
  4. 4. Ratio

    Divide 240 in the ratio 1:2:1

    Answer: 60, 120 and 60
  5. 5. Statistics

    Calculate the mean of: 10, 5, 21, 44, 21, 39. Give your answer to 2 decimal places

    Answer: 23.33

Tuesday 27 December 2011

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Write 0.052 in standard form

    Answer: 5.2 × 10-2
  2. 2. Algebra

    Factorise: x² - 3x - 28

    Answer: (x + 4)(x - 7)
  3. 3. Geometry

    Hypotenuse = 32cm, angle = 51°. Find adjacent side. Give your answer to 2 decimal places

    Answer: 20.14cm
  4. 4. Ratio

    Divide 132 in the ratio 4:1:1

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

    The mean of 5 numbers is 33. If 4 of them are 26, 48, 42, 28, what is the missing number?

    Answer: 21

Wednesday 28 December 2011

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Write 0.000088 in standard form

    Answer: 8.8 × 10-5
  2. 2. Algebra

    Factorise: x² + 8x - 9

    Answer: (x + 9)(x - 1)
  3. 3. Geometry

    Hypotenuse = 17cm, angle = 62°. Find adjacent side. Give your answer to 2 decimal places

    Answer: 7.98cm
  4. 4. Ratio

    Red and blue marbles are in the ratio 15:10. What fraction of the marbles are red?

    Answer: 3⁄5
  5. 5. Statistics

    The mean of 6 numbers is 34. If 5 of them are 25, 31, 27, 49, 26, what is the missing number?

    Answer: 46

Thursday 29 December 2011

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Write 55,000,000 in standard form

    Answer: 5.5 × 107
  2. 2. Algebra

    Factorise: x² - x - 72

    Answer: (x + 8)(x - 9)
  3. 3. Geometry

    Adjacent = 21cm, angle = 48°. Find opposite. Give your answer to 2 decimal places

    Answer: 23.32cm
  4. 4. Ratio

    Simplify: 10:8:6

    Answer: 5:4:3
  5. 5. Statistics

    Calculate the mean of: 49, 17, 47, 42, 21, 21. Give your answer to 2 decimal places

    Answer: 32.83

Friday 30 December 2011

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Write 160,000,000 in standard form

    Answer: 1.6 × 108
  2. 2. Algebra

    Factorise: x² + 5x - 84

    Answer: (x + 12)(x - 7)
  3. 3. Geometry

    Hypotenuse = 34cm, angle = 44°. Find adjacent side. Give your answer to 2 decimal places

    Answer: 24.46cm
  4. 4. Ratio

    Simplify: 12:8:24

    Answer: 3:2:6
  5. 5. Statistics

    Calculate the mean of: 39, 49, 9, 30, 37, 7, 5. Give your answer to 2 decimal places

    Answer: 25.14