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Cornerstone · Grades 3–5 Keystones #1 20 September 2015 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 20 September 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄3 + 7⁄8

    Answer: 37⁄24
  2. 2. Algebra Two-step equations

    Solve: 5x + 12 = 47

    Answer: x = 7
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 8cm and b = 7cm. Give your answer to 2 decimal places

    Answer: 10.63cm
  4. 4. Ratio Sharing in a ratio

    Divide 66 in the ratio 1:2:3

    Answer: 11, 22 and 33
  5. 5. Statistics Mean

    Find the mean of: 9, 19, 8

    Answer: 12

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