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Cornerstone · Grades 3–5 Keystones #1 17 January 2019 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 17 January 2019 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄5 + 1⁄3

    Answer: 14⁄15
  2. 2. Algebra Two-step equations

    Solve: 6x + 9 = 39

    Answer: x = 5
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 10cm and b = 15cm

    Answer: 18.03cm
  4. 4. Ratio Sharing in a ratio

    Share 51 in the ratio 1:2

    Answer: 17 and 34
  5. 5. Statistics Mean

    Find the mean of: 6, 19, 6, 2, 4

    Answer: 7.4

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