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Cornerstone · Grades 3–5 Keystones #1 28 January 2020 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 28 January 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄6 + 3⁄7

    Answer: 25⁄42
  2. 2. Algebra Two-step equations

    Solve: 4x - 5 = 51

    Answer: x = 14
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 12cm and 35cm

    Answer: 37cm
  4. 4. Ratio Sharing in a ratio

    Share 15 in the ratio 2:1

    Answer: 10 and 5
  5. 5. Statistics Mean

    Calculate the mean of: 42, 42, 20, 17, 36, 32, 28, 33

    Answer: 31.3

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