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Cornerstone · Grades 3–5 Keystones #1 20 October 2013 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 20 October 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 4⁄7 + 3⁄5

    Answer: 41⁄35
  2. 2. Algebra Two-step equations

    Solve: 7x - 17 = 18

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

    Find the hypotenuse of a right triangle with sides 20cm and 21cm

    Answer: 29cm
  4. 4. Ratio Sharing in a ratio

    Share 49 in the ratio 3:4

    Answer: 21 and 28
  5. 5. Statistics Mean

    Calculate the mean of: 47, 19, 37, 6, 28, 27, 29, 13

    Answer: 25.75

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