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Cornerstone · Grades 3–5 Keystones #1 31 August 2015 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 31 August 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄6 + 4⁄7

    Answer: 19⁄21
  2. 2. Algebra Two-step equations

    Solve: 8x - 16 = 64

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

    Find the hypotenuse of a right triangle with sides 15cm and 36cm

    Answer: 39cm
  4. 4. Ratio Sharing in a ratio

    Divide 161 in the ratio 2:2:3

    Answer: 46, 46 and 69
  5. 5. Statistics Mean

    Calculate the mean of: 48, 25, 26, 42, 38, 38. Give your answer to 2 decimal places

    Answer: 36.17

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