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Cornerstone · Grades 3–5 Keystones #1 18 September 2015 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 18 September 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 4⁄6 + 6⁄7

    Answer: 32⁄21
  2. 2. Algebra Two-step equations

    Solve: 3x - 20 = -8

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

    Calculate the hypotenuse when a = 6cm and b = 12cm. Give your answer to 2 decimal places

    Answer: 13.42cm
  4. 4. Ratio Sharing in a ratio

    Divide 84 in the ratio 1:1:4

    Answer: 14, 14 and 56
  5. 5. Statistics Mean

    Find the mean of: 4, 4, 19

    Answer: 9

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