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Cornerstone · Grades 3–5 Keystones #1 14 December 2010 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 14 December 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄6 + 1⁄5

    Answer: 7⁄10
  2. 2. Algebra Two-step equations

    Solve: 7x - 6 = 99

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

    Calculate the hypotenuse when a = 7cm and b = 10cm. Give your answer to 2 decimal places

    Answer: 12.21cm
  4. 4. Ratio Sharing in a ratio

    Divide 120 in the ratio 3:2:1

    Answer: 60, 40 and 20
  5. 5. Statistics Mean

    Find the mean of: 5, 24, 11, 20

    Answer: 15

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