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

Five GCSE retrieval questions · 7 August 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 5⁄8 + 2⁄5

    Answer: 41⁄40
  2. 2. Algebra Two-step equations

    Solve: 7x + 13 = 76

    Answer: x = 9
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 10cm and b = 7cm. Give your answer to 2 decimal places

    Answer: 12.21cm
  4. 4. Ratio Sharing in a ratio

    Divide 330 in the ratio 4:4:3

    Answer: 120, 120 and 90
  5. 5. Statistics Mean

    Find the mean of: 5, 6, 5, 17, 2

    Answer: 7