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

Five GCSE retrieval questions · 1 September 2019 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄7 + 1⁄3

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

    Solve: 7x - 6 = 99

    Answer: x = 15
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 20cm and 21cm

    Answer: 29cm
  4. 4. Ratio Sharing in a ratio

    Share 36 in the ratio 3:1

    Answer: 27 and 9
  5. 5. Statistics Mean

    Calculate the mean of: 41, 12, 5, 8, 13, 36, 41, 25

    Answer: 22.6

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