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Cornerstone · Grades 3–5 Keystones #1 11 January 2014 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 11 January 2014 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 6⁄8 + 2⁄4

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

    Solve: 7x - 5 = 79

    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 100 in the ratio 1:4

    Answer: 20 and 80
  5. 5. Statistics Mean

    Calculate the mean of: 46, 35, 25, 18, 16, 23, 24, 26. Give your answer to 2 decimal places

    Answer: 26.63

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