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Cornerstone · Grades 3–5 Keystones #1 24 January 2017 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 24 January 2017 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 4⁄6 + 1⁄6

    Answer: 5⁄6
  2. 2. Algebra Two-step equations

    Solve: 8x - 12 = 52

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

    Calculate the hypotenuse when a = 5cm and b = 12cm

    Answer: 13cm
  4. 4. Ratio Sharing in a ratio

    Divide 105 in the ratio 3:1:1

    Answer: 63, 21 and 21
  5. 5. Statistics Mean

    Calculate the mean of: 25, 36, 28, 15, 10, 46. Give your answer to 2 decimal places

    Answer: 26.67

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