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Cornerstone · Grades 3–5 Keystones #1 14 October 2021 Skills week 1 of 7
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Five GCSE retrieval questions · 14 October 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 5⁄7 + 1⁄7

    Answer: 6⁄7
  2. 2. Algebra Two-step equations

    Solve: 3x - 7 = 17

    Answer: x = 8
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 3cm and 4cm

    Answer: 5cm
  4. 4. Ratio Sharing in a ratio

    Share 78 in the ratio 1:2

    Answer: 26 and 52
  5. 5. Statistics Mean

    Find the mean of: 4, 5, 14, 4

    Answer: 6.75

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