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Cornerstone · Grades 3–5 Keystones #1 23 December 2020 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 23 December 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄6 + 3⁄8

    Answer: 17⁄24
  2. 2. Algebra Two-step equations

    Solve: 8x - 6 = 114

    Answer: x = 15
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 7cm and b = 12cm

    Answer: 13.89cm
  4. 4. Ratio Sharing in a ratio

    Share 25 in the ratio 3:2

    Answer: 15 and 10
  5. 5. Statistics Mean

    Find the mean of: 10, 2, 20, 15

    Answer: 11.75

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