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Cornerstone · Grades 3–5 Keystones #1 27 February 2015 Skills week 1 of 7
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Five GCSE retrieval questions · 27 February 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄5 + 5⁄6

    Answer: 43⁄30
  2. 2. Algebra Two-step equations

    Solve: 3x - 14 = 16

    Answer: x = 10
  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 144 in the ratio 3:3:2

    Answer: 54, 54 and 36
  5. 5. Statistics Mean

    Find the mean of: 6, 25, 8, 17

    Answer: 14

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