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Cornerstone · Grades 3–5 Keystones #1 8 August 2021 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 8 August 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄6 + 3⁄5

    Answer: 11⁄10
  2. 2. Algebra Two-step equations

    Solve: 8x - 16 = 72

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

    Find the hypotenuse of a right triangle with sides 7cm and 24cm

    Answer: 25cm
  4. 4. Ratio Sharing in a ratio

    Divide 115 in the ratio 1:2:2

    Answer: 23, 46 and 46
  5. 5. Statistics Mean

    Calculate the mean of: 32, 12, 32, 16, 25, 16, 41

    Answer: 24.9

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