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Cornerstone · Grades 3–5 Keystones #1 25 December 2014 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 25 December 2014 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄4 + 2⁄6

    Answer: 13⁄12
  2. 2. Algebra Two-step equations

    Solve: 3x + 11 = 23

    Answer: x = 4
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 8cm and b = 15cm

    Answer: 17cm
  4. 4. Ratio Sharing in a ratio

    Divide 175 in the ratio 2:4:1

    Answer: 50, 100 and 25
  5. 5. Statistics Mean

    Calculate the mean of: 17, 47, 41, 11, 25, 48

    Answer: 31.5

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