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Cornerstone · Grades 3–5 Keystones #1 11 April 2010 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 11 April 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄4 + 1⁄5

    Answer: 9⁄20
  2. 2. Algebra Two-step equations

    Solve: 6x + 15 = 39

    Answer: x = 4
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 5cm and 12cm

    Answer: 13cm
  4. 4. Ratio Sharing in a ratio

    Divide 135 in the ratio 4:2:3

    Answer: 60, 30 and 45
  5. 5. Statistics Mean

    Calculate the mean of: 18, 32, 13, 33, 34, 43, 10. Give your answer to 2 decimal places

    Answer: 26.14

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