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Cornerstone · Grades 3–5 Keystones #1 1 January 2014 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 1 January 2014 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 4⁄8 + 2⁄8

    Answer: 3⁄4
  2. 2. Algebra Two-step equations

    Solve: 3x + 9 = 18

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

    Find the hypotenuse of a right triangle with sides 15cm and 20cm

    Answer: 25cm
  4. 4. Ratio Sharing in a ratio

    Divide 225 in the ratio 4:2:3

    Answer: 100, 50 and 75
  5. 5. Statistics Mean

    Calculate the mean of: 14, 48, 12, 49, 42, 38, 38, 26. Give your answer to 2 decimal places

    Answer: 33.38

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