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Cornerstone · Grades 3–5 Keystones #1 5 December 2013 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 5 December 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 2⁄5 + 1⁄5

    Answer: 3⁄5
  2. 2. Algebra Two-step equations

    Solve: 4x - 13 = 15

    Answer: x = 7
  3. 3. Geometry Pythagoras — hypotenuse

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

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

    Divide 175 in the ratio 1:4:2

    Answer: 25, 100 and 50
  5. 5. Statistics Mean

    Find the mean of: 21, 6, 8, 2, 18

    Answer: 11

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