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Cornerstone · Grades 3–5 Keystones #1 2 March 2021 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 2 March 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄5 + 7⁄8

    Answer: 51⁄40
  2. 2. Algebra Two-step equations

    Solve: 4x - 13 = 11

    Answer: x = 6
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 12cm and b = 7cm

    Answer: 13.89cm
  4. 4. Ratio Sharing in a ratio

    Divide 130 in the ratio 2:2:1

    Answer: 52, 52 and 26
  5. 5. Statistics Mean

    Find the mean of: 5, 15, 8, 2, 19

    Answer: 9.8

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