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Cornerstone · Grades 3–5 Keystones #1 10 December 2013 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 10 December 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄5 + 3⁄8

    Answer: 39⁄40
  2. 2. Algebra Two-step equations

    Solve: 7x - 6 = 85

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

    Calculate the hypotenuse when a = 6cm and b = 5cm. Give your answer to 2 decimal places

    Answer: 7.81cm
  4. 4. Ratio Sharing in a ratio

    Divide 84 in the ratio 4:1:2

    Answer: 48, 12 and 24
  5. 5. Statistics Mean

    Find the mean of: 3, 14, 7

    Answer: 8

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