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Cornerstone · Grades 3–5 Keystones #1 17 May 2018 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 17 May 2018 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄5 + 5⁄8

    Answer: 49⁄40
  2. 2. Algebra Two-step equations

    Solve: 3x - 20 = 25

    Answer: x = 15
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 12cm and 35cm

    Answer: 37cm
  4. 4. Ratio Sharing in a ratio

    Divide 154 in the ratio 1:3:3

    Answer: 22, 66 and 66
  5. 5. Statistics Mean

    Calculate the mean of: 26, 7, 29, 30, 17, 42, 27, 24

    Answer: 25.3

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