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Cornerstone · Grades 3–5 Keystones #1 2 October 2016 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 2 October 2016 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄5 + 1⁄5

    Answer: 4⁄5
  2. 2. Algebra Two-step equations

    Solve: 2x - 20 = -6

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

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

    Answer: 9.9cm
  4. 4. Ratio Sharing in a ratio

    Divide 130 in the ratio 1:1:3

    Answer: 26, 26 and 78
  5. 5. Statistics Mean

    Find the mean of: 12, 17, 12, 11

    Answer: 13

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