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

  1. 1. Number Adding fractions

    Add: 3⁄8 + 2⁄4

    Answer: 7⁄8
  2. 2. Algebra Two-step equations

    Solve: 7x + 9 = 65

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

    Calculate the hypotenuse when a = 4cm and b = 15cm

    Answer: 15.52cm
  4. 4. Ratio Sharing in a ratio

    Divide 147 in the ratio 1:2:4

    Answer: 21, 42 and 84
  5. 5. Statistics Mean

    Find the mean of: 7, 5, 14, 11

    Answer: 9.25

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