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Cornerstone · Grades 3–5 Keystones #1 13 August 2013 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 13 August 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄4 + 5⁄7

    Answer: 17⁄14
  2. 2. Algebra Two-step equations

    Solve: 8x - 8 = 112

    Answer: x = 15
  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 108 in the ratio 4:1:1

    Answer: 72, 18 and 18
  5. 5. Statistics Mean

    Calculate the mean of: 20, 22, 40, 40, 19, 7, 23. Give your answer to 2 decimal places

    Answer: 24.43

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