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Cornerstone · Grades 3–5 Keystones #1 11 November 2019 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 11 November 2019 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄7 + 7⁄8

    Answer: 65⁄56
  2. 2. Algebra Two-step equations

    Solve: 8x - 6 = 90

    Answer: x = 12
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 8cm and b = 9cm

    Answer: 12.04cm
  4. 4. Ratio Sharing in a ratio

    Divide 225 in the ratio 4:2:3

    Answer: 100, 50 and 75
  5. 5. Statistics Mean

    Find the mean of: 7, 4, 8, 20

    Answer: 9.75

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