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Cornerstone · Grades 3–5 Keystones #1 12 September 2021 Skills week 1 of 7
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Five GCSE retrieval questions · 12 September 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄6 + 2⁄6

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

    Solve: 4x + 5 = 33

    Answer: x = 7
  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 54 in the ratio 1:2

    Answer: 18 and 36
  5. 5. Statistics Mean

    Calculate the mean of: 23, 16, 10, 31, 42, 19, 47

    Answer: 26.9

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