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

Five GCSE retrieval questions · 3 September 2014 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄7 + 1⁄7

    Answer: 2⁄7
  2. 2. Algebra Two-step equations

    Solve: 5x + 6 = 26

    Answer: x = 4
  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 145 in the ratio 3:1:1

    Answer: 87, 29 and 29
  5. 5. Statistics Mean

    Calculate the mean of: 45, 12, 9, 42, 46, 45. Give your answer to 2 decimal places

    Answer: 33.17

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