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Cornerstone · Grades 3–5 Keystones #1 20 April 2021 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 20 April 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄7 + 2⁄3

    Answer: 20⁄21
  2. 2. Algebra Two-step equations

    Solve: 2x - 17 = -9

    Answer: x = 4
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 10cm and b = 8cm

    Answer: 12.81cm
  4. 4. Ratio Sharing in a ratio

    Divide 176 in the ratio 2:3:3

    Answer: 44, 66 and 66
  5. 5. Statistics Mean

    Calculate the mean of: 21, 36, 19, 28, 8, 48, 50

    Answer: 30

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