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Cornerstone · Grades 3–5 Keystones #1 8 July 2020 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 8 July 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 4⁄6 + 7⁄8

    Answer: 37⁄24
  2. 2. Algebra Two-step equations

    Solve: 2x - 12 = 8

    Answer: x = 10
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 15cm and 20cm

    Answer: 25cm
  4. 4. Ratio Sharing in a ratio

    Divide 231 in the ratio 4:3:4

    Answer: 84, 63 and 84
  5. 5. Statistics Mean

    Calculate the mean of: 34, 39, 16, 21, 24, 6, 41, 49

    Answer: 28.8

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