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Cornerstone · Grades 3–5 Keystones #1 11 August 2019 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 11 August 2019 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 2⁄5 + 1⁄5

    Answer: 3⁄5
  2. 2. Algebra Two-step equations

    Solve: 6x - 16 = 38

    Answer: x = 9
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 9cm and 12cm

    Answer: 15cm
  4. 4. Ratio Sharing in a ratio

    Share 18 in the ratio 2:1

    Answer: 12 and 6
  5. 5. Statistics Mean

    Calculate the mean of: 49, 7, 20, 20, 7, 43, 18

    Answer: 23.4

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