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Cornerstone · Grades 3–5 Keystones #1 28 March 2021 Skills week 1 of 7
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Five GCSE retrieval questions · 28 March 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄12 + 7⁄12

    Answer: 5⁄6
  2. 2. Algebra Two-step equations

    Solve: 7x + 8 = 64

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

    Calculate the hypotenuse when a = 12cm and b = 4cm

    Answer: 12.65cm
  4. 4. Ratio Sharing in a ratio

    Share 42 in the ratio 2:1

    Answer: 28 and 14
  5. 5. Statistics Mean

    Calculate the mean of: 8, 39, 14, 33, 13, 13, 11

    Answer: 18.7

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