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Cornerstone · Grades 3–5 Keystones #1 14 January 2023 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 14 January 2023 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 4⁄6 + 5⁄7

    Answer: 29⁄21
  2. 2. Algebra Two-step equations

    Solve: 6x + 9 = 75

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

    Find the hypotenuse of a right triangle with sides 12cm and 16cm

    Answer: 20cm
  4. 4. Ratio Sharing in a ratio

    Share 84 in the ratio 3:4

    Answer: 36 and 48
  5. 5. Statistics Mean

    Calculate the mean of: 24, 35, 49, 34, 5, 48, 8, 18

    Answer: 27.6

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