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Cornerstone · Grades 3–5 Keystones #1 6 January 2021 Skills week 1 of 7
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Five GCSE retrieval questions · 6 January 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄7 + 3⁄7

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

    Solve: 5x + 8 = 63

    Answer: x = 11
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 11cm and b = 9cm

    Answer: 14.21cm
  4. 4. Ratio Sharing in a ratio

    Share 80 in the ratio 4:1

    Answer: 64 and 16
  5. 5. Statistics Mean

    Calculate the mean of: 30, 41, 46, 28, 13, 21, 25

    Answer: 29.1

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