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Cornerstone · Grades 3–5 Keystones #1 16 February 2013 Skills week 1 of 7
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Five GCSE retrieval questions · 16 February 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄5 + 3⁄6

    Answer: 7⁄10
  2. 2. Algebra Two-step equations

    Solve: 4x + 5 = 17

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

    Calculate the hypotenuse when a = 4cm and b = 11cm. Give your answer to 2 decimal places

    Answer: 11.7cm
  4. 4. Ratio Sharing in a ratio

    Share 70 in the ratio 4:1

    Answer: 56 and 14
  5. 5. Statistics Mean

    Find the mean of: 16, 8, 16, 12

    Answer: 13

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