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Cornerstone · Grades 3–5 Keystones #1 26 October 2022 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 26 October 2022 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄5 + 1⁄3

    Answer: 8⁄15
  2. 2. Algebra Two-step equations

    Solve: 8x - 5 = 51

    Answer: x = 7
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 10cm and b = 9cm

    Answer: 13.45cm
  4. 4. Ratio Sharing in a ratio

    Share 90 in the ratio 1:4

    Answer: 18 and 72
  5. 5. Statistics Mean

    Calculate the mean of: 25, 49, 25, 12, 23, 17

    Answer: 25.2

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