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Cornerstone · Grades 3–5 Keystones #1 11 March 2020 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 11 March 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄5 + 1⁄5

    Answer: 4⁄5
  2. 2. Algebra Two-step equations

    Solve: 3x + 15 = 48

    Answer: x = 11
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 12cm and 16cm

    Answer: 20cm
  4. 4. Ratio Sharing in a ratio

    Share 48 in the ratio 1:3

    Answer: 12 and 36
  5. 5. Statistics Mean

    Find the mean of: 17, 4, 11, 20

    Answer: 13

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