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

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

  1. 1. Number Adding fractions

    Add: 1⁄4 + 1⁄6

    Answer: 5⁄12
  2. 2. Algebra Two-step equations

    Solve: 5x - 5 = 55

    Answer: x = 12
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 15cm and 20cm

    Answer: 25cm
  4. 4. Ratio Sharing in a ratio

    Divide 143 in the ratio 4:3:4

    Answer: 52, 39 and 52
  5. 5. Statistics Mean

    Find the mean of: 3, 7, 8, 15, 17

    Answer: 10

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