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Cornerstone · Grades 3–5 Keystones #1 21 October 2015 Skills week 1 of 7
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Five GCSE retrieval questions · 21 October 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄5 + 1⁄8

    Answer: 13⁄40
  2. 2. Algebra Two-step equations

    Solve: 7x - 6 = 57

    Answer: x = 9
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 7cm and b = 11cm. Give your answer to 2 decimal places

    Answer: 13.04cm
  4. 4. Ratio Sharing in a ratio

    Share 76 in the ratio 1:3

    Answer: 19 and 57
  5. 5. Statistics Mean

    Find the mean of: 10, 9, 10, 15

    Answer: 11

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