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Cornerstone · Grades 3–5 Keystones #1 19 October 2012 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 19 October 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄4 + 3⁄5

    Answer: 27⁄20
  2. 2. Algebra Two-step equations

    Solve: 8x - 10 = 54

    Answer: x = 8
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 3cm and b = 5cm. Give your answer to 2 decimal places

    Answer: 5.83cm
  4. 4. Ratio Sharing in a ratio

    Share 90 in the ratio 4:1

    Answer: 72 and 18
  5. 5. Statistics Mean

    Find the mean of: 10, 7, 13

    Answer: 10

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