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Cornerstone · Grades 3–5 Keystones #1 25 January 2022 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 25 January 2022 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄3 + 5⁄7

    Answer: 22⁄21
  2. 2. Algebra Two-step equations

    Solve: 6x + 9 = 63

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

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

    Answer: 15.56cm
  4. 4. Ratio Sharing in a ratio

    Divide 90 in the ratio 4:2:3

    Answer: 40, 20 and 30
  5. 5. Statistics Mean

    Calculate the mean of: 14, 32, 29, 42, 6, 39, 8, 50

    Answer: 27.5

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