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Cornerstone · Grades 3–5 Keystones #1 26 March 2021 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 26 March 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄6 + 6⁄7

    Answer: 25⁄21
  2. 2. Algebra Two-step equations

    Solve: 3x - 15 = -3

    Answer: x = 4
  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 60 in the ratio 3:2

    Answer: 36 and 24
  5. 5. Statistics Mean

    Find the mean of: 8, 10, 15, 9, 17

    Answer: 11.8

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