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Cornerstone · Grades 3–5 Keystones #1 9 February 2015 Skills week 1 of 7
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Five GCSE retrieval questions · 9 February 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄3 + 2⁄4

    Answer: 7⁄6
  2. 2. Algebra Two-step equations

    Solve: 6x + 10 = 34

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

    Calculate the hypotenuse when a = 8cm and b = 5cm. Give your answer to 2 decimal places

    Answer: 9.43cm
  4. 4. Ratio Sharing in a ratio

    Divide 90 in the ratio 1:3:1

    Answer: 18, 54 and 18
  5. 5. Statistics Mean

    Find the mean of: 18, 18, 19, 18, 2

    Answer: 15

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