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Cornerstone · Grades 3–5 Keystones #1 3 September 2019 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 3 September 2019 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄4 + 3⁄5

    Answer: 17⁄20
  2. 2. Algebra Two-step equations

    Solve: 3x + 9 = 39

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

    Find the hypotenuse of a right triangle with sides 6cm and 8cm

    Answer: 10cm
  4. 4. Ratio Sharing in a ratio

    Share 102 in the ratio 1:2

    Answer: 34 and 68
  5. 5. Statistics Mean

    Find the mean of: 12, 9, 11, 20, 20

    Answer: 14.4

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