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Cornerstone · Grades 3–5 Keystones #1 2 December 2020 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 2 December 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄6 + 5⁄7

    Answer: 22⁄21
  2. 2. Algebra Two-step equations

    Solve: 3x + 10 = 43

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

    Find the hypotenuse of a right triangle with sides 9cm and 40cm

    Answer: 41cm
  4. 4. Ratio Sharing in a ratio

    Share 119 in the ratio 4:3

    Answer: 68 and 51
  5. 5. Statistics Mean

    Find the mean of: 12, 11, 7, 5, 7

    Answer: 8.4

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