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

Five GCSE retrieval questions · 7 March 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄3 + 1⁄7

    Answer: 10⁄21
  2. 2. Algebra Two-step equations

    Solve: 7x + 9 = 93

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

    Calculate the hypotenuse when a = 10cm and b = 5cm

    Answer: 11.18cm
  4. 4. Ratio Sharing in a ratio

    Share 45 in the ratio 2:3

    Answer: 18 and 27
  5. 5. Statistics Mean

    Find the mean of: 15, 3, 16, 14

    Answer: 12

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