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Cornerstone · Grades 3–5 Keystones #1 25 June 2020 Skills week 1 of 7
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Five GCSE retrieval questions · 25 June 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 5⁄8 + 2⁄8

    Answer: 7⁄8
  2. 2. Algebra Two-step equations

    Solve: 8x - 17 = 103

    Answer: x = 15
  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 108 in the ratio 2:1

    Answer: 72 and 36
  5. 5. Statistics Mean

    Calculate the mean of: 15, 33, 31, 10, 45, 35

    Answer: 28.2

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