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Cornerstone · Grades 3–5 Keystones #1 15 July 2021 Skills week 1 of 7
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Five GCSE retrieval questions · 15 July 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄3 + 6⁄8

    Answer: 17⁄12
  2. 2. Algebra Two-step equations

    Solve: 4x - 10 = 26

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

    Find the hypotenuse of a right triangle with sides 15cm and 20cm

    Answer: 25cm
  4. 4. Ratio Sharing in a ratio

    Share 52 in the ratio 3:1

    Answer: 39 and 13
  5. 5. Statistics Mean

    Find the mean of: 14, 13, 16, 15, 9

    Answer: 13.4

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