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Cornerstone · Grades 3–5 Keystones #1 27 September 2020 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 27 September 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄5 + 2⁄3

    Answer: 19⁄15
  2. 2. Algebra Two-step equations

    Solve: 3x + 7 = 37

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

    Find the hypotenuse of a right triangle with sides 7cm and 24cm

    Answer: 25cm
  4. 4. Ratio Sharing in a ratio

    Share 30 in the ratio 2:1

    Answer: 20 and 10
  5. 5. Statistics Mean

    Find the mean of: 6, 17, 13, 15, 16

    Answer: 13.4

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