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Cornerstone · Grades 3–5 Keystones #1 4 May 2021 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 4 May 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄4 + 2⁄8

    Answer: 1⁄2
  2. 2. Algebra Two-step equations

    Solve: 4x + 8 = 36

    Answer: x = 7
  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

    Divide 280 in the ratio 2:1:2

    Answer: 112, 56 and 112
  5. 5. Statistics Mean

    Calculate the mean of: 20, 42, 9, 50, 31, 25, 48, 21

    Answer: 30.8

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