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Cornerstone · Grades 3–5 Keystones #1 20 July 2021 Skills week 1 of 7
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Five GCSE retrieval questions · 20 July 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 7⁄8 + 1⁄4

    Answer: 9⁄8
  2. 2. Algebra Two-step equations

    Solve: 8x - 10 = 102

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

    Find the hypotenuse of a right triangle with sides 5cm and 12cm

    Answer: 13cm
  4. 4. Ratio Sharing in a ratio

    Share 102 in the ratio 1:2

    Answer: 34 and 68
  5. 5. Statistics Mean

    Calculate the mean of: 39, 14, 27, 10, 10, 49

    Answer: 24.8

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