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Cornerstone · Grades 3–5 Keystones #1 16 September 2014 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 16 September 2014 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄3 + 3⁄8

    Answer: 25⁄24
  2. 2. Algebra Two-step equations

    Solve: 5x + 3 = 58

    Answer: x = 11
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 15cm and 20cm

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

    Divide 171 in the ratio 3:2:4

    Answer: 57, 38 and 76
  5. 5. Statistics Mean

    Calculate the mean of: 11, 32, 24, 25, 42, 36. Give your answer to 2 decimal places

    Answer: 28.33

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