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Cornerstone · Grades 3–5 Keystones #1 15 June 2021 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 15 June 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 5⁄8 + 1⁄5

    Answer: 33⁄40
  2. 2. Algebra Two-step equations

    Solve: 4x + 9 = 21

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

    Find the hypotenuse of a right triangle with sides 9cm and 12cm

    Answer: 15cm
  4. 4. Ratio Sharing in a ratio

    Divide 60 in the ratio 1:1:4

    Answer: 10, 10 and 40
  5. 5. Statistics Mean

    Find the mean of: 20, 10, 7

    Answer: 12.333333333333

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