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Cornerstone · Grades 3–5 Keystones #1 25 September 2019 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 25 September 2019 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄5 + 1⁄3

    Answer: 14⁄15
  2. 2. Algebra Two-step equations

    Solve: 4x - 10 = 30

    Answer: x = 10
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 7cm and b = 7cm

    Answer: 9.9cm
  4. 4. Ratio Sharing in a ratio

    Divide 192 in the ratio 2:1:1

    Answer: 96, 48 and 48
  5. 5. Statistics Mean

    Calculate the mean of: 31, 21, 43, 34, 31, 29, 46, 10

    Answer: 30.6

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