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Cornerstone · Grades 3–5 Keystones #1 23 May 2017 Skills week 1 of 7
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Five GCSE retrieval questions · 23 May 2017 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 5⁄6 + 2⁄4

    Answer: 4⁄3
  2. 2. Algebra Two-step equations

    Solve: 2x + 10 = 18

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

    Find the hypotenuse of a right triangle with sides 9cm and 12cm

    Answer: 15cm
  4. 4. Ratio Sharing in a ratio

    Divide 99 in the ratio 4:3:2

    Answer: 44, 33 and 22
  5. 5. Statistics Mean

    Calculate the mean of: 6, 42, 32, 8, 22, 26, 13, 38. Give your answer to 2 decimal places

    Answer: 23.38

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