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

Five GCSE retrieval questions · 1 May 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄5 + 1⁄6

    Answer: 11⁄30
  2. 2. Algebra Two-step equations

    Solve: 2x - 11 = 9

    Answer: x = 10
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 20cm and 21cm

    Answer: 29cm
  4. 4. Ratio Sharing in a ratio

    Share 68 in the ratio 1:3

    Answer: 17 and 51
  5. 5. Statistics Mean

    Calculate the mean of: 39, 45, 24, 31, 33, 23, 21

    Answer: 30.9

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