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Cornerstone · Grades 3–5 Keystones #1 1 December 2011 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 1 December 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄7 + 5⁄6

    Answer: 41⁄42
  2. 2. Algebra Two-step equations

    Solve: 4x - 12 = 48

    Answer: x = 15
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 6cm and b = 14cm. Give your answer to 2 decimal places

    Answer: 15.23cm
  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: 9, 6, 20, 13

    Answer: 12

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