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Cornerstone · Grades 3–5 Keystones #1 10 August 2015 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 10 August 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄6 + 6⁄8

    Answer: 11⁄12
  2. 2. Algebra Two-step equations

    Solve: 5x + 15 = 55

    Answer: x = 8
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 3cm and b = 5cm. Give your answer to 2 decimal places

    Answer: 5.83cm
  4. 4. Ratio Sharing in a ratio

    Divide 102 in the ratio 1:4:1

    Answer: 17, 68 and 17
  5. 5. Statistics Mean

    Calculate the mean of: 42, 45, 9, 21, 50, 26, 26, 29

    Answer: 31

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