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Cornerstone · Grades 3–5 Keystones #1 19 September 2014 Skills week 1 of 7
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Five GCSE retrieval questions · 19 September 2014 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄4 + 3⁄5

    Answer: 17⁄20
  2. 2. Algebra Two-step equations

    Solve: 5x + 13 = 33

    Answer: x = 4
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 6cm and 8cm

    Answer: 10cm
  4. 4. Ratio Sharing in a ratio

    Divide 153 in the ratio 4:1:4

    Answer: 68, 17 and 68
  5. 5. Statistics Mean

    Calculate the mean of: 44, 5, 42, 38, 12, 14, 28. Give your answer to 2 decimal places

    Answer: 26.14

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