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Cornerstone · Grades 3–5 Keystones #1 20 February 2017 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 20 February 2017 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄5 + 4⁄6

    Answer: 16⁄15
  2. 2. Algebra Two-step equations

    Solve: 5x - 15 = 55

    Answer: x = 14
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 4cm and b = 13cm. Give your answer to 2 decimal places

    Answer: 13.6cm
  4. 4. Ratio Sharing in a ratio

    Divide 84 in the ratio 3:1:2

    Answer: 42, 14 and 28
  5. 5. Statistics Mean

    Find the mean of: 6, 18, 20, 12

    Answer: 14

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