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Cornerstone · Grades 3–5 Keystones #1 25 May 2021 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 25 May 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄6 + 1⁄5

    Answer: 11⁄30
  2. 2. Algebra Two-step equations

    Solve: 8x - 17 = 103

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

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

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

    Divide 216 in the ratio 4:2:3

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

    Calculate the mean of: 45, 7, 11, 6, 34, 8, 11

    Answer: 17.4

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