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Cornerstone · Grades 3–5 Keystones #1 4 September 2010 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 4 September 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄5 + 4⁄6

    Answer: 19⁄15
  2. 2. Algebra Two-step equations

    Solve: 8x - 6 = 26

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

    Calculate the hypotenuse when a = 12cm and b = 6cm. Give your answer to 2 decimal places

    Answer: 13.42cm
  4. 4. Ratio Sharing in a ratio

    Divide 224 in the ratio 4:1:3

    Answer: 112, 28 and 84
  5. 5. Statistics Mean

    Calculate the mean of: 43, 36, 26, 7, 31, 32, 26, 34. Give your answer to 2 decimal places

    Answer: 29.38

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