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

Five GCSE retrieval questions · 3 September 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄5 + 3⁄5

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

    Solve: 3x - 5 = 10

    Answer: x = 5
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 5cm and 12cm

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

    Divide 105 in the ratio 2:2:1

    Answer: 42, 42 and 21
  5. 5. Statistics Mean

    Calculate the mean of: 46, 6, 20, 38, 43, 23, 10, 6

    Answer: 24

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