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Cornerstone · Grades 3–5 Keystones #1 26 January 2011 Skills week 1 of 7
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Five GCSE retrieval questions · 26 January 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄4 + 2⁄5

    Answer: 13⁄20
  2. 2. Algebra Two-step equations

    Solve: 6x - 20 = 16

    Answer: x = 6
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 3cm and b = 6cm. Give your answer to 2 decimal places

    Answer: 6.71cm
  4. 4. Ratio Sharing in a ratio

    Divide 208 in the ratio 3:4:1

    Answer: 78, 104 and 26
  5. 5. Statistics Mean

    Find the mean of: 6, 4, 3, 13, 14

    Answer: 8

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