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Cornerstone · Grades 3–5 Keystones #1 10 October 2014 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 10 October 2014 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄4 + 4⁄5

    Answer: 13⁄10
  2. 2. Algebra Two-step equations

    Solve: 6x - 12 = 18

    Answer: x = 5
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 8cm and 15cm

    Answer: 17cm
  4. 4. Ratio Sharing in a ratio

    Divide 168 in the ratio 3:4:1

    Answer: 63, 84 and 21
  5. 5. Statistics Mean

    Find the mean of: 8, 20, 4, 12

    Answer: 11

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