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Cornerstone · Grades 3–5 Keystones #1 9 August 2010 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 9 August 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄7 + 7⁄8

    Answer: 65⁄56
  2. 2. Algebra Two-step equations

    Solve: 4x - 10 = 50

    Answer: x = 15
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 8cm and b = 11cm. Give your answer to 2 decimal places

    Answer: 13.6cm
  4. 4. Ratio Sharing in a ratio

    Share 126 in the ratio 4:3

    Answer: 72 and 54
  5. 5. Statistics Mean

    Find the mean of: 20, 20, 5, 9, 16

    Answer: 14

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