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Cornerstone · Grades 3–5 Keystones #1 19 December 2019 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 19 December 2019 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄3 + 1⁄7

    Answer: 17⁄21
  2. 2. Algebra Two-step equations

    Solve: 5x - 18 = 27

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

    Find the hypotenuse of a right triangle with sides 6cm and 8cm

    Answer: 10cm
  4. 4. Ratio Sharing in a ratio

    Divide 216 in the ratio 2:3:4

    Answer: 48, 72 and 96
  5. 5. Statistics Mean

    Calculate the mean of: 8, 18, 29, 45, 15, 48, 16, 42

    Answer: 27.6

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