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Cornerstone · Grades 3–5 Keystones #1 11 February 2014 Skills week 1 of 7
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Five GCSE retrieval questions · 11 February 2014 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄3 + 3⁄5

    Answer: 19⁄15
  2. 2. Algebra Two-step equations

    Solve: 8x - 16 = 88

    Answer: x = 13
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 7cm and b = 13cm. Give your answer to 2 decimal places

    Answer: 14.76cm
  4. 4. Ratio Sharing in a ratio

    Divide 88 in the ratio 1:2:1

    Answer: 22, 44 and 22
  5. 5. Statistics Mean

    Calculate the mean of: 36, 20, 17, 34, 43, 33, 26. Give your answer to 2 decimal places

    Answer: 29.86

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