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Cornerstone · Grades 3–5 Keystones #1 8 November 2017 Skills week 1 of 7
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Five GCSE retrieval questions · 8 November 2017 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 6⁄8 + 5⁄7

    Answer: 41⁄28
  2. 2. Algebra Two-step equations

    Solve: 3x - 6 = 36

    Answer: x = 14
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 10cm and b = 9cm. Give your answer to 2 decimal places

    Answer: 13.45cm
  4. 4. Ratio Sharing in a ratio

    Divide 140 in the ratio 2:4:1

    Answer: 40, 80 and 20
  5. 5. Statistics Mean

    Find the mean of: 6, 11, 5, 25, 13

    Answer: 12

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