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Cornerstone · Grades 3–5 Keystones #1 21 September 2021 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 21 September 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄8 + 3⁄4

    Answer: 9⁄8
  2. 2. Algebra Two-step equations

    Solve: 5x - 7 = 53

    Answer: x = 12
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 3cm and b = 4cm

    Answer: 5cm
  4. 4. Ratio Sharing in a ratio

    Divide 210 in the ratio 2:1:2

    Answer: 84, 42 and 84
  5. 5. Statistics Mean

    Find the mean of: 20, 3, 20, 3

    Answer: 11.5

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