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Cornerstone · Grades 3–5 Keystones #1 16 August 2011 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 16 August 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄3 + 7⁄8

    Answer: 29⁄24
  2. 2. Algebra Two-step equations

    Solve: 2x + 3 = 25

    Answer: x = 11
  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

    Divide 150 in the ratio 1:2:3

    Answer: 25, 50 and 75
  5. 5. Statistics Mean

    Find the mean of: 20, 15, 7, 6

    Answer: 12

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