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Cornerstone · Grades 3–5 Keystones #1 12 September 2019 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 12 September 2019 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄4 + 7⁄8

    Answer: 9⁄8
  2. 2. Algebra Two-step equations

    Solve: 2x + 6 = 18

    Answer: x = 6
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 3cm and b = 9cm

    Answer: 9.49cm
  4. 4. Ratio Sharing in a ratio

    Divide 50 in the ratio 2:2:1

    Answer: 20, 20 and 10
  5. 5. Statistics Mean

    Calculate the mean of: 47, 31, 36, 42, 23, 46, 22, 28

    Answer: 34.4

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