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Cornerstone · Grades 3–5 Keystones #1 19 June 2015 Skills week 1 of 7
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Five GCSE retrieval questions · 19 June 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄3 + 1⁄8

    Answer: 19⁄24
  2. 2. Algebra Two-step equations

    Solve: 2x + 10 = 34

    Answer: x = 12
  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 40 in the ratio 2:1:1

    Answer: 20, 10 and 10
  5. 5. Statistics Mean

    Calculate the mean of: 25, 12, 45, 39, 22, 8, 12, 14. Give your answer to 2 decimal places

    Answer: 22.13

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