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Cornerstone · Grades 3–5 Keystones #1 16 January 2021 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 16 January 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄3 + 4⁄8

    Answer: 5⁄6
  2. 2. Algebra Two-step equations

    Solve: 6x - 12 = 30

    Answer: x = 7
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 11cm and b = 8cm

    Answer: 13.6cm
  4. 4. Ratio Sharing in a ratio

    Divide 168 in the ratio 3:2:2

    Answer: 72, 48 and 48
  5. 5. Statistics Mean

    Calculate the mean of: 42, 16, 18, 34, 41, 17, 10, 50

    Answer: 28.5

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