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Cornerstone · Grades 3–5 Keystones #1 10 February 2021 Skills week 1 of 7
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Five GCSE retrieval questions · 10 February 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄6 + 2⁄6

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

    Solve: 7x + 3 = 66

    Answer: x = 9
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 7cm and b = 4cm

    Answer: 8.06cm
  4. 4. Ratio Sharing in a ratio

    Divide 72 in the ratio 1:2:1

    Answer: 18, 36 and 18
  5. 5. Statistics Mean

    Calculate the mean of: 24, 35, 13, 24, 35, 50, 45

    Answer: 32.3

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