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Cornerstone · Grades 3–5 Keystones #1 14 January 2015 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 14 January 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 2⁄9 + 5⁄9

    Answer: 7⁄9
  2. 2. Algebra Two-step equations

    Solve: 2x + 12 = 28

    Answer: x = 8
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 8cm and 15cm

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

    Divide 180 in the ratio 1:1:4

    Answer: 30, 30 and 120
  5. 5. Statistics Mean

    Calculate the mean of: 29, 17, 31, 41, 17, 48

    Answer: 30.5

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