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

Five GCSE retrieval questions · 3 December 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄4 + 1⁄7

    Answer: 25⁄28
  2. 2. Algebra Two-step equations

    Solve: 8x - 18 = 70

    Answer: x = 11
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 5cm and b = 11cm

    Answer: 12.08cm
  4. 4. Ratio Sharing in a ratio

    Share 50 in the ratio 1:4

    Answer: 10 and 40
  5. 5. Statistics Mean

    Calculate the mean of: 41, 24, 34, 11, 40, 32, 12, 19

    Answer: 26.6

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