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Cornerstone · Grades 3–5 Keystones #1 6 July 2012 Skills week 1 of 7
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Five GCSE retrieval questions · 6 July 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 7⁄10 + 1⁄10

    Answer: 4⁄5
  2. 2. Algebra Two-step equations

    Solve: 7x - 10 = 18

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

    Find the hypotenuse of a right triangle with sides 8cm and 15cm

    Answer: 17cm
  4. 4. Ratio Sharing in a ratio

    Divide 208 in the ratio 3:4:1

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

    Calculate the mean of: 21, 18, 41, 21, 46, 22. Give your answer to 2 decimal places

    Answer: 28.17

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