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Cornerstone · Grades 3–5 Keystones #1 19 October 2022 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 19 October 2022 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 7⁄8 + 3⁄5

    Answer: 59⁄40
  2. 2. Algebra Two-step equations

    Solve: 5x + 15 = 55

    Answer: x = 8
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 5cm and b = 15cm

    Answer: 15.81cm
  4. 4. Ratio Sharing in a ratio

    Divide 224 in the ratio 3:4:1

    Answer: 84, 112 and 28
  5. 5. Statistics Mean

    Find the mean of: 11, 12, 3, 7, 9

    Answer: 8.4

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