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Cornerstone · Grades 3–5 Keystones #1 13 December 2017 Skills week 1 of 7
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Five GCSE retrieval questions · 13 December 2017 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 4⁄5 + 2⁄3

    Answer: 22⁄15
  2. 2. Algebra Two-step equations

    Solve: 3x + 10 = 28

    Answer: x = 6
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 6cm and b = 15cm. Give your answer to 2 decimal places

    Answer: 16.16cm
  4. 4. Ratio Sharing in a ratio

    Share 95 in the ratio 3:2

    Answer: 57 and 38
  5. 5. Statistics Mean

    Calculate the mean of: 23, 41, 21, 8, 18, 8, 6. Give your answer to 2 decimal places

    Answer: 17.86

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