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Cornerstone · Grades 3–5 Keystones #1 4 March 2021 Skills week 1 of 7
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Five GCSE retrieval questions · 4 March 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 2⁄12 + 2⁄12

    Answer: 1⁄3
  2. 2. Algebra Two-step equations

    Solve: 6x + 4 = 64

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

    Find the hypotenuse of a right triangle with sides 20cm and 21cm

    Answer: 29cm
  4. 4. Ratio Sharing in a ratio

    Share 64 in the ratio 1:3

    Answer: 16 and 48
  5. 5. Statistics Mean

    Find the mean of: 20, 17, 2

    Answer: 13

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