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Cornerstone · Grades 3–5 Keystones #1 2 October 2010 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 2 October 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄8 + 1⁄6

    Answer: 13⁄24
  2. 2. Algebra Two-step equations

    Solve: 3x + 9 = 21

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

    Calculate the hypotenuse when a = 11cm and b = 11cm. Give your answer to 2 decimal places

    Answer: 15.56cm
  4. 4. Ratio Sharing in a ratio

    Divide 126 in the ratio 2:4:3

    Answer: 28, 56 and 42
  5. 5. Statistics Mean

    Find the mean of: 2, 14, 2

    Answer: 6

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