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Cornerstone · Grades 3–5 Keystones #1 22 April 2011 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 22 April 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄5 + 4⁄6

    Answer: 13⁄15
  2. 2. Algebra Two-step equations

    Solve: 3x - 18 = 21

    Answer: x = 13
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 5cm and b = 5cm. Give your answer to 2 decimal places

    Answer: 7.07cm
  4. 4. Ratio Sharing in a ratio

    Share 18 in the ratio 2:1

    Answer: 12 and 6
  5. 5. Statistics Mean

    Find the mean of: 11, 14, 2

    Answer: 9

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