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Cornerstone · Grades 3–5 Keystones #1 27 September 2017 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 27 September 2017 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄5 + 1⁄7

    Answer: 26⁄35
  2. 2. Algebra Two-step equations

    Solve: 7x + 10 = 73

    Answer: x = 9
  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

    Divide 84 in the ratio 3:2:1

    Answer: 42, 28 and 14
  5. 5. Statistics Mean

    Find the mean of: 15, 16, 8

    Answer: 13

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