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

  1. 1. Number Adding fractions

    Calculate: 2⁄10 + 6⁄10

    Answer: 4⁄5
  2. 2. Algebra Two-step equations

    Solve: 4x + 7 = 47

    Answer: x = 10
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 6cm and 8cm

    Answer: 10cm
  4. 4. Ratio Sharing in a ratio

    Share 60 in the ratio 1:4

    Answer: 12 and 48
  5. 5. Statistics Mean

    Find the mean of: 20, 9, 8, 4, 15

    Answer: 11.2

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