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Cornerstone · Grades 3–5 Keystones #1 13 September 2015 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 13 September 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 2⁄5 + 1⁄5

    Answer: 3⁄5
  2. 2. Algebra Two-step equations

    Solve: 7x - 11 = 73

    Answer: x = 12
  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 95 in the ratio 2:3

    Answer: 38 and 57
  5. 5. Statistics Mean

    Calculate the mean of: 48, 37, 36, 43, 47, 42. Give your answer to 2 decimal places

    Answer: 42.17

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