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Cornerstone · Grades 3–5 Keystones #1 9 June 2013 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 9 June 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄4 + 3⁄5

    Answer: 27⁄20
  2. 2. Algebra Two-step equations

    Solve: 5x + 5 = 40

    Answer: x = 7
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 12cm and 16cm

    Answer: 20cm
  4. 4. Ratio Sharing in a ratio

    Share 102 in the ratio 2:1

    Answer: 68 and 34
  5. 5. Statistics Mean

    Calculate the mean of: 39, 22, 48, 46, 9, 49, 15. Give your answer to 2 decimal places

    Answer: 32.57

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